WO2019158602A1 - Protéines de liaison à l'antigène se liant au pmhc hla-dq2.5:dq2.5 présentant un peptide de gliadine - Google Patents

Protéines de liaison à l'antigène se liant au pmhc hla-dq2.5:dq2.5 présentant un peptide de gliadine Download PDF

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WO2019158602A1
WO2019158602A1 PCT/EP2019/053580 EP2019053580W WO2019158602A1 WO 2019158602 A1 WO2019158602 A1 WO 2019158602A1 EP 2019053580 W EP2019053580 W EP 2019053580W WO 2019158602 A1 WO2019158602 A1 WO 2019158602A1
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amino acid
seq
antigen binding
sequence
acid sequence
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PCT/EP2019/053580
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Geir Åge LØSET
Lene Støkken HØYDAHL
Inger Sandlie
Ludvig Magne Sollid
Rahel FRICK
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Universitetet I Oslo
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Priority to CA3091055A priority Critical patent/CA3091055A1/fr
Priority to US16/969,679 priority patent/US20210147552A1/en
Priority to EP19706441.3A priority patent/EP3752526A1/fr
Priority to AU2019220329A priority patent/AU2019220329A1/en
Publication of WO2019158602A1 publication Critical patent/WO2019158602A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/16—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from plants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
    • C07K16/2833—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against MHC-molecules, e.g. HLA-molecules
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/564—Immunoassay; Biospecific binding assay; Materials therefor for pre-existing immune complex or autoimmune disease, i.e. systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, rheumatoid factors or complement components C1-C9
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/57—Medicinal preparations containing antigens or antibodies characterised by the type of response, e.g. Th1, Th2
    • A61K2039/577—Medicinal preparations containing antigens or antibodies characterised by the type of response, e.g. Th1, Th2 tolerising response
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/32—Immunoglobulins specific features characterized by aspects of specificity or valency specific for a neo-epitope on a complex, e.g. antibody-antigen or ligand-receptor
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/565—Complementarity determining region [CDR]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
    • C07K2317/622—Single chain antibody (scFv)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
    • G01N2333/415—Assays involving biological materials from specific organisms or of a specific nature from plants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
    • G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
    • G01N2333/705—Assays involving receptors, cell surface antigens or cell surface determinants
    • G01N2333/70503—Immunoglobulin superfamily, e.g. VCAMs, PECAM, LFA-3
    • G01N2333/70539—MHC-molecules, e.g. HLA-molecules
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2800/00—Detection or diagnosis of diseases
    • G01N2800/06—Gastro-intestinal diseases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2800/00—Detection or diagnosis of diseases
    • G01N2800/24—Immunology or allergic disorders

Definitions

  • Antigen binding proteins which bind to the pMHC HLA-DQ2.5:DQ2.5 presenting a gliadin peptide
  • the present invention relates generally to the field of antigen binding proteins, in particular to antibodies which bind to, or bind specifically to, the pMHC (peptide-Major Histocompatibility Complex) HLA-DQ2.5:DQ2.5 presenting a gliadin peptide. More particularly, the invention relates to antigen binding proteins (e.g. antibodies) which bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a1a, or which bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a2. The invention further relates to compositions and immunoconjugates comprising such antibodies and to methods of producing such antibodies. The invention also relates to methods and uses which employ such antibodies, for example in the treatment of celiac disease.
  • antigen binding proteins e.g. antibodies
  • Celiac disease is an autoimmune-like, chronic T cell-mediated inflammatory disorder of the small intestine caused by dietary gluten proteins from wheat, barley and rye.
  • the disease has a strong HLA association with about 90% of the patients expressing HLA-DQ2.5 ( DQA1 * 05-DQB1 * 02 ), and most of the remaining HLA-DQ8 ⁇ DQAV03-DQB1 * 03:02) or HLA-DQ2.2 ( DQA1 * 02:01 - DQB1 * 02).
  • Gluten proteins are resistant to proteolysis due to high proline content, and as a result, long immunogenic peptide fragments remain in the intestine.
  • the T- cell response to wheat gluten is dominated by reactivity to two epitopes of ogliadin, DQ2.5-glia-a1 a (PFPQPELPY) and DQ2.5-glia-a2 (PQPELPYPQ), which can be found within a proteolysis resistant ogliadin 33mer peptide, as well as to two epitopes of w-gliadin, DQ2.5-glia-oo1 (PFPQPEQPF) and DQ2.5-glia-oo2
  • CD4 + T cells Activation of CD4 + T cells by antigen presentation both in the mesenteric lymph nodes and in gut-associated lymphoid tissue is thought to be an initial event in induction of CD pathogenesis.
  • APC antigen presenting cells
  • PCs plasma cells secreting antibodies against gluten and TG2 are increased in density in the lamina intestinal of CD patients. It is not clear how these different cell populations contribute to the disease development. In contrast, only scarce populations of B cells can be found.
  • TCR T-cell receptor
  • mAbs monoclonal antibodies with TCR-like specificity are attractive alternatives and generation of mAbs against pMHC has been reported using both hybridoma technology and phage display.
  • agents such as antibodies
  • Such antibodies may also be used in the treatment, prophylaxis and diagnosis of celiac disease.
  • the present inventors have identified antigen binding proteins, specifically antibodies, which bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a1a, or which bind specifically to HLA-DQ2.5:DQ2.5-glia-a2.
  • the antibodies generated by the inventors have advantageous properties which make them ideal agents for the above-mentioned uses.
  • the invention provides an antigen binding protein which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5 presenting a gliadin peptide, said antigen binding protein comprising at least one light chain variable domain and at least one heavy chain variable domain, each domain comprising three
  • CDRs complementarity determining regions
  • said antigen binding protein binds to, or specifically binds to, HLA-
  • DQ2.5:DQ2.5-glia-a1 a and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds, to HLA- DQ2.5:DQ2.5-glia-a2 and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1a and comprises
  • variable heavy (VH) CDR1 comprising the amino acid sequence of SEQ ID NO:5, or a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to SEQ ID NO:5
  • variable heavy (VH) CDR2 comprising the amino acid sequence of SEQ ID NO:6, or a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to SEQ ID NO:6;
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2 and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and comprises
  • variable heavy (VH) CDR1 comprising the amino acid sequence of SEQ ID NO:5, or a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to SEQ ID NO:5
  • variable heavy (VH) CDR2 comprising the amino acid sequence of SEQ ID NO:6, or a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to SEQ ID NO:6;
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and comprises
  • variable heavy (VH) CDR1 comprising the amino acid sequence of SEQ ID NO:425
  • variable heavy (VH) CDR2 comprising the amino acid sequence of SEQ ID NO:427
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • the antigen binding protein comprises a light chain variable domain that comprises
  • VL variable light
  • VL variable light
  • variable light (VL) CDR3 comprising the amino acid sequence of SEQ ID NO:439.
  • the antigen binding protein comprises a light chain variable domain that comprises
  • VL variable light
  • VL variable light
  • VL variable light
  • the antigen binding protein comprises a heavy chain variable domain that comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • an antigen binding protein comprising a variable heavy (VH) CDR2 comprising the amino acid sequence of SEQ ID NO:42 or a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to SEQ ID NO:42 binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia- cda.
  • VH variable heavy
  • an antigen binding protein comprising a variable heavy (VH) CDR2 comprising the amino acid sequence of SEQ ID NO:168 or a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to SEQ ID NO:168 binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia- a.2.
  • VH variable heavy
  • the antigen binding protein comprises a light chain variable domain that comprises
  • variable light (VL) CDR1 comprising the amino acid sequence of SEQ ID NO:435, preferably SEQ ID NO:436
  • variable light (VL) CDR2 comprising the amino acid sequence of SEQ ID NO:437, preferably SEQ ID NO:438;
  • VL variable light
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • said antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • the invention provides an antigen binding protein which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5 presenting a gliadin peptide, said antigen binding protein comprising at least one light chain variable domain and at least one heavy chain variable domain, each domain comprising three complementarity determining regions (CDRs), wherein said antigen binding protein binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1 a and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and comprises
  • VH variable heavy
  • VH variable heavy
  • variable heavy (VH) CDR3 comprising the amino acid sequence of SEQ ID NO:169 or a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to SEQ ID NO:169
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • the antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and comprises at least one light chain variable domain having a VL CDR1 , VL CDR2 and VL CDR3 amino acid sequence as set forth in any one of Tables A-l or Table AA herein and/or (preferably“and”) at least one heavy chain variable domain having a VH CDR1 , VH CDR2 and VH CDR3 amino acid sequence as set forth in any one of Tables A-l or Table AA herein.
  • Tables A-l herein set forth sequences of the R2A1-8E, R3A2-9F, R4A1-3A (also referred to as 107), 107-4.5D, 107-4.6D, 107-4.6C, 107-4.7C, 107- 5.6A and 107-15.6A antibodies.
  • Table AA herein sets forth sequences of the RF1 17 antibody.
  • preferred antigen binding proteins are those comprising (or based on) these antibody sequences.
  • the antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and comprises at least one light chain variable domain having a VL CDR1 , VL CDR2 and VL CDR3 amino acid sequence as set forth in any one of Tables D-l or Table AA herein and/or (preferably “and”) at least one heavy chain variable domain having a VH CDR1 , VH CDR2 and VH CDR3 amino acid sequence as set forth in any one of Tables D-l or Table AA herein.
  • Tables D-l herein set forth sequences of the 107-4.5D, 107-4.6D, 107-4.6C, 107-4.7C, 107-5.6A and 107-15.6A antibodies.
  • Table AA herein sets forth sequences of the RF117 antibody.
  • preferred antigen binding proteins are those comprising (or based on) these antibody sequences.
  • the antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and comprises at least one light chain variable domain having a VL CDR1 , VL CDR2 and VL CDR3 amino acid sequence as set forth in any one of Tables J-W herein and/or (preferably“and”) at least one heavy chain variable domain having a VH CDR1 , VH CDR2 and VH CDR3 amino acid sequence as set forth in any one of Tables J-W herein.
  • Tables J- W herein set forth sequences of the 206, 217, 218, 220, 221 , 223, 226, 228, 206-
  • preferred antigen binding proteins are those comprising (or based on) these antibody sequences.
  • the antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and has at least one light chain variable domain comprising a VL CDR1 , VL CDR2 and VL CDR3 amino acid sequence as set forth in any one of Tables R-W herein and/or (preferably “and”) at least one heavy chain variable domain having a VH CDR1 , VH CDR2 and VH CDR3 amino acid sequence as set forth in any one of Tables R-W herein.
  • Tables R-W herein set forth sequences of the 206-2. B1 1 , 206-3. D8, 206-3. C7, 206-
  • preferred antigen binding proteins are those comprising (or based on) these antibody sequences.
  • a preferred antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1 a comprises (or is based on) the antibody sequences (e.g. three VH CDR sequences and three VL CDR sequences) of the 107-4.7C antibody described herein (see Table G).
  • a preferred antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprises (or is based on) the antibody sequences (e.g. three VH CDR sequences and three VL CDR sequences) of the 206-2. B11 antibody described herein (see Table R).
  • a preferred antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprises (or is based on) the antibody sequences (e.g. three VH CDR sequences and three VL CDR sequences) of the 206-3. C1 1 antibody described herein (see Table U).
  • the antigen binding protein of the invention is not the R2A1-8E, R3A2-9F or R4A1-3A (also referred to as 107) antibody, e.g. as defined by their light chain variable region and heavy chain variable region sequences herein (see Tables A-C).
  • the antigen binding protein of the invention is not the 206, 217, 218, 220, 221 , 223, 226, 228 antibody e.g. as defined by their light chain variable region and heavy chain variable region sequences herein (see Tables J-Q).
  • HLA-DQ2.5:DQ2.5-glia-a1a antigen binding proteins of the invention have a T (threonine) residue at position 5 and/or position 6 of the VH CDR3, and/or a VL FR1 (VL framework 1 ) sequence other than SEQ ID NO: 15.
  • HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention do not have an S (serine) residue at position 5 and an S residue at position 6 of the VH CDR1.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:9 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO: 10 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:6 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:7 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1 a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:8, a VL CDR2 of SEQ ID NO:9, and a VL CDR3 of SEQ ID NO:10, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:5, a VH CDR2 of SEQ ID NO:6, and a VH CDR3 of SEQ ID NO:7.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:3 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:4,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:3 and a VL domain that comprises the amino acid sequence of SEQ ID NO:4.
  • an antibody in IgG format is preferred.
  • a preferred embodiment of the invention provides an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:444 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:445 or a sequence substantially homologous thereto.
  • the invention provides an antibody that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1a which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:446 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:447 or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:444 and a light chain that comprises the amino acid sequence of SEQ ID NO:445.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:446 and a light chain that comprises the amino acid sequence of SEQ ID NO:447.
  • the section immediately above relates to the R2A1-8E antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:27 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:28 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:24 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:25 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:26, a VL CDR2 of SEQ ID NO:27, and a VL CDR3 of SEQ ID NO:28, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:23, a VH CDR2 of SEQ ID NO:24, and a VH CDR3 of SEQ ID NO:25.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:21 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:22,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:21 and a VL domain that comprises the amino acid sequence of SEQ ID NO:22.
  • an antibody in IgG format is preferred.
  • a preferred embodiment of the invention provides an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:448 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:449 or a sequence substantially homologous thereto.
  • the invention provides an antibody that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1a which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:450 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:451 or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:448 and a light chain that comprises the amino acid sequence of SEQ ID NO:449.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:450 and a light chain that comprises the amino acid sequence of SEQ ID NO:451.
  • an antigen binding protein e.g. an antibody which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:45 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:46 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:42 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:43 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:44, a VL CDR2 of SEQ ID NO:45, and a VL CDR3 of SEQ ID NO:46, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:41 , a VH CDR2 of SEQ ID NO:42, and a VH CDR3 of SEQ ID NO:43.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:9 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:40,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:39 and a VL domain that comprises the amino acid sequence of SEQ ID NO:40.
  • an antibody in IgG format is preferred.
  • a preferred embodiment of the invention provides an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:452 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:453 or a sequence substantially homologous thereto.
  • the invention provides an antibody that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1a which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:454 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:455 or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:452 and a light chain that comprises the amino acid sequence of SEQ ID NO:453.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:454 and a light chain that comprises the amino acid sequence of SEQ ID NO:455.
  • the section immediately above relates to the R4A1-3A (107) antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:63 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:64 or a sequence substantially homologous thereto; and/or (preferably “and”) wherein said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:60 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:61 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:62, a VL CDR2 of SEQ ID NO:63, and a VL CDR3 of SEQ ID NO:64, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:59, a VH CDR2 of SEQ ID NO:60, and a VH CDR3 of SEQ ID NO:61.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:57 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:58,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:57 and a VL domain that comprises the amino acid sequence of SEQ ID NO:58.
  • the section immediately above relates to the 107-4.5D antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:82 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:78 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:79 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:80, a VL CDR2 of SEQ ID NO:81 , and a VL CDR3 of SEQ ID NO:82, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:77, a VH CDR2 of SEQ ID NO:78, and a VH CDR3 of SEQ ID NO:79.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:75 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:76,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:75 and a VL domain that comprises the amino acid sequence of SEQ ID NO:76.
  • the section immediately above relates to the 107-4.6D antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:99 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID N0:100 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:96 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:97 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:98, a VL CDR2 of SEQ ID NO:99, and a VL CDR3 of SEQ ID NO:100, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:95, a VH CDR2 of SEQ ID NO:96, and a VH CDR3 of SEQ ID NO:97.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:93 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:94,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:93 and a VL domain that comprises the amino acid sequence of SEQ ID NO:94.
  • the section immediately above relates to the 107-4.6C antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:117 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:118 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:114 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:115 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:116, a VL CDR2 of SEQ ID NO:117, and a VL CDR3 of SEQ ID NO:1 18, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:113, a VH CDR2 of SEQ ID NO:114, and a VH CDR3 of SEQ ID NO:115.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:11 1 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:112, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:11 1 and a VL domain that comprises the amino acid sequence of SEQ ID NO:112.
  • the section immediately above relates to the 107-4.7C antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:135 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:136 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:132 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:133 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:134, a VL CDR2 of SEQ ID NO:135, and a VL CDR3 of SEQ ID NO:136, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:131 , a VH CDR2 of SEQ ID NO:132, and a VH CDR3 of SEQ ID NO:133.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:129 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:130,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:129 and a VL domain that comprises the amino acid sequence of SEQ ID NO:130.
  • the section immediately above relates to the 107-5.6A antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:153 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:154 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:150 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:151 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:152, a VL CDR2 of SEQ ID NO:153, and a VL CDR3 of SEQ ID NO:154, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:149, a VH CDR2 of SEQ ID NO:150, and a VH CDR3 of SEQ ID NO:151.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:147 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:148,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:147 and a VL domain that comprises the amino acid sequence of SEQ ID NO:148.
  • the section immediately above relates to the 107-15.6A antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:504 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:505 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a and that comprises:
  • VL domain that comprises a VL CDR1 of SEQ ID NO:503, a VL CDR2 of SEQ ID NO:504, and a VL CDR3 of SEQ ID NO:505, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:500, a VH CDR2 of SEQ ID NO:501 , and a VH CDR3 of SEQ ID NO:502.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:498 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:499,or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:498 and a VL domain that comprises the amino acid sequence of SEQ ID NO:499.
  • an antibody in IgG format is preferred.
  • a preferred embodiment of the invention provides an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:514 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:515 or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:514 and a light chain that comprises the amino acid sequence of SEQ ID NO:515.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:171 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO: 172 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:168 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:169 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:170, a VL CDR2 of SEQ ID NO:172, and a VL CDR3 of SEQ ID NO:173, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:167, a VH CDR2 of SEQ ID NO:168, and a VH CDR3 of SEQ ID NO:169.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:165 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:166, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:165 and a VL domain that comprises the amino acid sequence of SEQ ID NO:166.
  • an antibody in IgG format is preferred.
  • a preferred embodiment of the invention provides an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:456 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:457 or a sequence substantially homologous thereto.
  • the invention provides an antibody that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2 which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:458 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:459 or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:456 and a light chain that comprises the amino acid sequence of SEQ ID NO:457.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:458 and a light chain that comprises the amino acid sequence of SEQ ID NO:459.
  • the section immediately above relates to the 206 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:189 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:190 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises: (d) a variable heavy (VH) CDR1 that comprises the amino acid sequence of SEQ ID NO:185 or a sequence substantially homologous thereto,
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:186 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:187 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:188, a VL CDR2 of SEQ ID NO:189, and a VL CDR3 of SEQ ID NO:190, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:185, a VH CDR2 of SEQ ID NO:186, and a VH CDR3 of SEQ ID NO:187.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:183 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:184, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:183 and a VL domain that comprises the amino acid sequence of SEQ ID NO:184.
  • the section immediately above relates to the 217 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NQ:207 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:208 or a sequence substantially homologous thereto
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:204 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:205 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:206, a VL CDR2 of SEQ ID NO:207, and a VL CDR3 of SEQ ID NO:208, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:203, a VH CDR2 of SEQ ID NO:204, and a VH CDR3 of SEQ ID NO:205.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:201 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:202, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:201 and a VL domain that comprises the amino acid sequence of SEQ ID NO:202.
  • the section immediately above relates to the 218 antibody.
  • an antigen binding protein e.g. an antibody which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises: (a) a variable light (VL) CDR1 that comprises the amino acid sequence of SEQ ID NO:224 or a sequence substantially homologous thereto,
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:225 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:226 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:222 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:223 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:224, a VL CDR2 of SEQ ID NO:225, and a VL CDR3 of SEQ ID NO:226, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:221 , a VH CDR2 of SEQ ID NO:222, and a VH CDR3 of SEQ ID NO:223.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:219 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:220, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:219 and a VL domain that comprises the amino acid sequence of SEQ ID NO:220.
  • an antibody in IgG format is preferred.
  • a preferred embodiment of the invention provides an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 which has a heavy chain that comprises the amino acid sequence of SEQ ID NQ:460 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:461 or a sequence substantially homologous thereto.
  • the invention provides an antibody that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2 which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:462 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:463 or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:460 and a light chain that comprises the amino acid sequence of SEQ ID NO:461.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:462 and a light chain that comprises the amino acid sequence of SEQ ID NO:463.
  • the section immediately above relates to the 220 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:243 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:244 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:240 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:241 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:242, a VL CDR2 of SEQ ID NO:243, and a VL CDR3 of SEQ ID NO:244, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:239, a VH CDR2 of SEQ ID NO:240, and a VH CDR3 of SEQ ID NO:241.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:237 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:238, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:237 and a VL domain that comprises the amino acid sequence of SEQ ID NO:238.
  • the section immediately above relates to the 221 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:261 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:262 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises: (d) a variable heavy (VH) CDR1 that comprises the amino acid sequence of SEQ ID NO:257 or a sequence substantially homologous thereto,
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:258 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:259 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:260, a VL CDR2 of SEQ ID NO:261 , and a VL CDR3 of SEQ ID NO:262, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:257, a VH CDR2 of SEQ ID NO:258, and a VH CDR3 of SEQ ID NO:259.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:255 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:256, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:255 and a VL domain that comprises the amino acid sequence of SEQ ID NO:256.
  • the section immediately above relates to the 223 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:279 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:280 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:276 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:277 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:278, a VL CDR2 of SEQ ID NO:279, and a VL CDR3 of SEQ ID NO:280, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:275, a VH CDR2 of SEQ ID NO:276, and a VH CDR3 of SEQ ID NO:277.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:273 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:274, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that specifically binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:273 and a VL domain that comprises the amino acid sequence of SEQ ID NO:274.
  • the section immediately above relates to the 226 antibody.
  • an antigen binding protein e.g. an antibody which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises: (a) a variable light (VL) CDR1 that comprises the amino acid sequence of SEQ ID NO:296 or a sequence substantially homologous thereto,
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:297 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:298 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:294 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:295 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:296, a VL CDR2 of SEQ ID NO:297, and a VL CDR3 of SEQ ID NO:298, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:293, a VH CDR2 of SEQ ID NO:294, and a VH CDR3 of SEQ ID NO:295.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:291 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:292, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:291 and a VL domain that comprises the amino acid sequence of SEQ ID NO:292.
  • an antibody in IgG format is preferred.
  • a preferred embodiment of the invention provides an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:464 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:465 or a sequence substantially homologous thereto.
  • the invention provides an antibody that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2, which has a heavy chain that comprises the amino acid sequence of SEQ ID NO:466 or a sequence substantially homologous thereto and/or a light chain that comprises the amino acid sequence of SEQ ID NO:467 or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:464 and a light chain that comprises the amino acid sequence of SEQ ID NO:465.
  • an antibody comprises a heavy chain that comprises the amino acid sequence of SEQ ID NO:466 and a light chain that comprises the amino acid sequence of SEQ ID NO:467.
  • the section immediately above relates to the 228 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:315 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:316 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:312 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:313 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:314, a VL CDR2 of SEQ ID NO:315, and a VL CDR3 of SEQ ID NO:316, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:31 1 , a VH CDR2 of SEQ ID NO:312, and a VH CDR3 of SEQ ID NO:313.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:309 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:310, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:309 and a VL domain that comprises the amino acid sequence of SEQ ID NO:310.
  • the section immediately above relates to the 206-2. B1 1 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:333 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:334 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises: (d) a variable heavy (VH) CDR1 that comprises the amino acid sequence of SEQ ID NO:329 or a sequence substantially homologous thereto,
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:330 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:331 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:332, a VL CDR2 of SEQ ID NO:333, and a VL CDR3 of SEQ ID NO:334, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:329, a VH CDR2 of SEQ ID NO:330, and a VH CDR3 of SEQ ID NO:331.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:327 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:328, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:327 and a VL domain that comprises the amino acid sequence of SEQ ID NO:328.
  • the section immediately above relates to the 206-3. D8 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:351 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:352 or a sequence substantially homologous thereto
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:348 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:349 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:350, a VL CDR2 of SEQ ID NO:351 , and a VL CDR3 of SEQ ID NO:352, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:347, a VH CDR2 of SEQ ID NO:348, and a VH CDR3 of SEQ ID NO:349.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:345 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:346, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:345 and a VL domain that comprises the amino acid sequence of SEQ ID NO:346.
  • the section immediately above relates to the 206-3. C7 antibody.
  • an antigen binding protein e.g. an antibody which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises: (a) a variable light (VL) CDR1 that comprises the amino acid sequence of SEQ ID NO:368 or a sequence substantially homologous thereto,
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:369 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:370 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:366 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:367 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:368, a VL CDR2 of SEQ ID NO:369, and a VL CDR3 of SEQ ID NO:370, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:365, a VH CDR2 of SEQ ID NO:366, and a VH CDR3 of SEQ ID NO:367.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:363 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:364, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:363 and a VL domain that comprises the amino acid sequence of SEQ ID NO:364.
  • the section immediately above relates to the 206-3. C11 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:387 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:388 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:384 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:385 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:386, a VL CDR2 of SEQ ID NO:387, and a VL CDR3 of SEQ ID NO:388, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:383, a VH CDR2 of SEQ ID NO:384, and a VH CDR3 of SEQ ID NO:385.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:381 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:382, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:381 and a VL domain that comprises the amino acid sequence of SEQ ID NO:382.
  • the section immediately above relates to the 206-3. F6 antibody.
  • an antigen binding protein (e.g. an antibody) which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein said light chain variable region comprises:
  • VL variable light
  • VL CDR2 that comprises the amino acid sequence of SEQ ID NO:405 or a sequence substantially homologous thereto
  • VL CDR3 that comprises the amino acid sequence of SEQ ID NO:406 or a sequence substantially homologous thereto; and/or (preferably “and”)
  • said heavy chain variable region comprises:
  • VH variable heavy
  • VH CDR2 that comprises the amino acid sequence of SEQ ID NO:402 or a sequence substantially homologous thereto
  • VH CDR3 that comprises the amino acid sequence of SEQ ID NO:403 or a sequence substantially homologous thereto.
  • a preferred “sequence substantially homologous thereto” is a sequence containing 1 , 2 or 3 amino acid substitutions, additions or deletions relative to the stated CDR sequence.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and that comprises: a VL domain that comprises a VL CDR1 of SEQ ID NO:404, a VL CDR2 of SEQ ID NO:405, and a VL CDR3 of SEQ ID NO:406, and
  • VH domain that comprises a VH CDR1 of SEQ ID NO:401 , a VH CDR2 of SEQ ID NO:402, and a VH CDR3 of SEQ ID NO:403.
  • Certain preferred embodiments of the invention provide an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:399 or a sequence substantially homologous thereto and/or a VL domain that comprises the amino acid sequence of SEQ ID NO:400, or a sequence substantially homologous thereto.
  • a preferred“sequence substantially homologous thereto” is a sequence having at least 80% sequence identity thereto.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a VH domain that comprises the amino acid sequence of SEQ ID NO:399 and a VL domain that comprises the amino acid sequence of SEQ ID NO:400.
  • the section immediately above relates to the 206-12. F6 antibody.
  • the antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1 a and comprises a VL CDR1 that has a H at position 1 and/or an S at position 4.
  • the antigen binding protein binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1a and has a VL CDR3 that has a P at position 7.
  • the antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 and comprises a VL CDR1 that has a Q at position 1 and/or an S position 4. In some embodiments, the antigen binding protein binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia- a2 and has a VL CDR3 that has a P at position 7.
  • the present invention provides an antigen binding protein which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5 presenting a peptide (e.g. a gliadin peptide (or gliadin derived peptide) or a celiac disease associated peptide or a gluten-derived peptide), said antigen binding protein comprising at least one light chain variable domain and at least one heavy chain variable domain, each domain comprising three complementarity determining regions (CDRs), wherein said antigen binding protein (e.g. antibody) comprises CDRs and/or variable domains as defined elsewhere herein.
  • a peptide e.g. a gliadin peptide (or gliadin derived peptide) or a celiac disease associated peptide or a gluten-derived peptide
  • said antigen binding protein comprising at least one light chain variable domain and at least one heavy chain variable domain, each domain comprising three complementarity determining regions (CDRs)
  • the present invention provides an antigen binding protein (e.g. an antibody), said antigen binding protein comprising at least one light chain variable domain and at least one heavy chain variable domain, each domain comprising three complementarity determining regions (CDRs), wherein said antigen binding protein (e.g. antibody) comprises CDRs and/or variable domains as defined elsewhere herein.
  • an antigen binding protein e.g. an antibody
  • said antigen binding protein comprising at least one light chain variable domain and at least one heavy chain variable domain, each domain comprising three complementarity determining regions (CDRs)
  • CDRs complementarity determining regions
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5- glia- a1 a or an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein binding of the antigen binding protein to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 is characterized by a recognition motif (or“footprint” or“codon”) which comprises the amino acids at positions corresponding to N92, S93, Y94, D28 and S30 of the light chain variable region of SEQ ID NO:40 or SEQ ID NO:166.
  • a recognition motif or“footprint” or“codon”
  • the light chain variable region residues mentioned above, N92, S93, Y94, D28 and S30, correspond to IMGT (ImMunoGeneTics (www.imgt.org)) light chain variable region residue numbers (or residue positions) N108, S114, Y1 15, D28, S36 in relation to antibody 107 and N108, S109, Y1 14, D28, S36 in relation to antibody 206.
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5- glia-a1a or an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein binding of the antigen binding protein to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 is characterized by a recognition motif (or“footprint” or“codon”) which comprises the amino acids at positions corresponding to N92, S93, Y94, D28 and S30 of the light chain variable region of SEQ ID NO:40 or SEQ ID NO:166, and the amino acids at positions corresponding to a Y60, Q64, D66 and R70 of the M
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5- glia-cda or an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein binding of the antigen binding protein to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 is characterized by a recognition motif (or“footprint” or“codon”) which comprises the amino acids at positions N92, S93, Y94, D28 and S30 of said light chain variable region.
  • a recognition motif or“footprint” or“codon”
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5- glia-a1a or an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, wherein binding of the antigen binding protein to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 is characterized by a recognition motif (or“footprint” or“codon”) which comprises the amino acids at positions N92, S93, Y94, D28 and S30 of said light chain variable region, and the amino acids at positions Y60, Q64, D66 and R70 of the MHC beta chain of SEQ ID NO:494 (the beta chain of the HLA-DQ
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a or an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 wherein binding of the antigen binding protein to HLA-DQ2.5:DQ2.5-glia-a1a or HLA- DQ2.5:DQ2.5-glia-a2 is characterized by a recognition motif as described above, has three VL CDRs and/or three VH CDRs, or a light chain variable domain and/or a heavy chain variable domain, or a light chain and/or a heavy chain as described elsewhere herein.
  • a recognition motif as described above
  • A“recognition motif” may be defined as a group of amino acids that contribute to (or participate in), or a group of amino acids that are predicted to contribute to (or predicted to participate in), the binding (or interaction) between the antigen binding protein and the target antigen (in this case the pMHCs HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2).
  • the recognition motif may be as determined or predicted using antibody modeling or antibody docking methods (e.g. antibody modeling or antibody docking software).
  • the RosettaAntibody and/or SnugDock applications may be used for such methods in order to generate models of the docked complexes of an antigen binding protein (e.g. antibody) and its pMHC target, for example as described in Example 4 herein.
  • antibody modeling may be done using the crystal structure of the binary complex of HLA-DQ2.5:DQ2.5-glia-a1 a (PDB ID 1 S9V [C.-Y. Kim, 2004]) or the crystal structure of HLA-DQ2.5:DQ2.5-glia-a2 (PDB ID 40ZF [Petersen et al.,
  • the recognition motif is as determined by crystallographic methods (e.g. the crystal structure of the antigen binding protein: HLA-DQ2.5:DQ2.5-glia-a1a complex or antigen binding protein: HLA-DQ2.5:DQ2.5-glia-a2 complex.
  • the invention provides an antigen binding protein that binds to HLA-DQ2.5 presenting a gliadin peptide, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, said light chain variable region comprising
  • VL variable light
  • VL variable light
  • VL variable light
  • the invention provides an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1 a or to HLA-DQ2.5:DQ2.5- glia-a2, said antigen binding protein comprising at least one heavy chain variable region that comprises three CDRs and at least one light chain variable region that comprises three CDRs, said light chain variable region comprising
  • VL variable light
  • VL variable light
  • VL variable light
  • the antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a or an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprising a light chain variable region as defined in the paragraph immediately above comprises three VL CDRs and/or three VH CDRs, or a light chain variable domain and/or a heavy chain variable domain, or a light chain and/or a heavy chain as described elsewhere herein.
  • the antigen binding protein comprises a light chain variable domain that comprises
  • VL variable light
  • VL variable light
  • VL variable light
  • the antigen binding protein comprises a heavy chain variable domain that comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • Antigen binding proteins are described herein as comprising certain elements or regions (e.g. CDRs)“comprising” or“that comprise” the stated amino acid sequences.
  • antigen binding proteins of the invention are those comprising elements or regions (e.g. CDRs)“consisting of” or“that consist of” the stated amino acid sequences.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1 a comprises a heavy chain variable region that is an IGHV6 (or IGHV6-1 ) heavy chain variable region.
  • IGHV6-1 stands for immunoglobulin heavy variable 6-1.
  • an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1 a comprises a heavy chain variable region that is
  • an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1 a comprises a heavy chain variable region that is
  • IGHV6 or IGHV6-1 heavy chain gene segment
  • IGHV6 Characteristics of IGHV6 (or IGHV6-1 ) are known to a person skilled in the art (for example from IMGT®, the international ImMunoGeneTics information system®, http://www.imgt.org).
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprises a heavy chain variable region that is an IGHV1 (or IGHV1-69) heavy chain variable region.
  • IGHV1-69 stands for immunoglobulin heavy variable 1-69.
  • an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2 comprises a heavy chain variable region that is characterised by IGHV1 (or IGHV1-69) gene usage.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5- glia-a2 comprises a heavy chain variable region that is characterised by an IGHV1 (or IGHV1-69) heavy chain gene segment.
  • Characteristics of IGHV1 (or IGHV1-69) are known to a person skilled in the art (for example from IMGT®, the international ImMunoGeneTics information system®, http://www.imgt.org).
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a or an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5- glia-a2 comprises a light chain variable region that is an IGKV1 light chain variable region.
  • IGKV1 stands for immunoglobulin kappa variable 1.
  • an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1 a or an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 comprises a light chain variable region that is characterised by IGKV1 gene usage.
  • an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5- glia-a1a or an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a2 comprises a light chain variable region that is characterised by an IGKV1 light chain gene segment. Characteristics of IGKV1 are known to a person skilled in the art (for example from IMGT®, the international
  • the IGKV1 mentioned above in connection with an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a is IGKV1-9.
  • the IGKV1 mentioned above in connection with an antigen binding protein that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 is IGKV1-12.
  • IGHV for IGKV gene usage is set forth in the sequence Tables herein and any of these may be used in accordance with the present invention Details and options in connection with IGHD (immunoglobulin heavy diversity), IGHJ (immunoglobulin heavy joining), IGKD (immunoglobulin kappa diversity) and IGKJ (immunoglobulin kappa joining) usage are also set forth in the sequence Tables herein.
  • antigen binding proteins of the invention may be characterised by the presence (or usage) of any one or more of the IGHV, IGKV, IGHD, IGKD, IGHJ or IGKJ mentioned in the sequence Tables herein (or combinations thereof, e.g. the specific combinations mentioned in the sequence Tables).
  • substantially homologous as used herein in connection with an amino acid or nucleic acid sequence includes sequences having at least 65%, 70% or 75%, preferably at least 80%, and even more preferably at least 85%, 90%, 95%, 96%, 97%, 98% or 99%, sequence identity to the amino acid or nucleic acid sequence disclosed.
  • Substantially homologous sequences of the invention thus include single or multiple base or amino acid alterations (additions, substitutions, insertions or deletions) to the sequences of the invention.
  • preferred substantially homologous sequences contain up to 5, e.g.
  • a given starting sequence is relatively short (e.g. five amino acids in length or three amino acids in length)
  • fewer amino acid substitutions may be present in sequences substantially homologous thereto as compared with the number of amino acid substitutions that might optionally be made in a sequence substantially homologous to a longer starting sequence.
  • the VL CDR2 sequence of antigen binding proteins of the invention is three amino acids in length.
  • a sequence substantially homologous to a starting VH CDR2 sequence in accordance with the present invention e.g. a starting VH CDR2 sequence which in some embodiments may be three amino acid residues in length, preferably has 1 or 2 (more preferably 1 ) altered amino acids in comparison with the starting sequence.
  • the number of altered amino acids in substantially homologous sequences can be tailored to the length of a given starting CDR sequence.
  • different numbers of altered amino acids can be present depending on the length of a given starting CDR sequence such as to achieve a particular % sequence identity in the CDRs, for example a sequence identity of at least 60%, 70%, 80%, or at least, 90%.
  • Routine methods in the art such as alanine scanning mutagenesis and/or analysis of crystal structure of the antigen-antibody complex can be used in order to determine which amino acid residues of the CDRs do not contribute or do not contribute significantly to antigen binding and therefore are good candidates for alteration or substitution in the embodiments of the invention involving substantially homologous sequences.
  • substantially homologous also includes modifications or chemical equivalents of the amino acid and nucleotide sequences of the present invention that perform substantially the same function as the proteins or nucleic acid molecules of the invention in substantially the same way.
  • any substantially homologous antigen binding protein e.g. antibody
  • any substantially homologous antigen binding protein e.g. antibody
  • any substantially homologous antigen binding protein should retain the ability to bind to, or specifically bind to, the same epitope of the antigen as recognized by the antigen binding protein (e.g. antibody) in question, for example, the same epitope recognized by the CDR domains of the invention or the VH and VL domains of the invention as described herein.
  • any substantially homologous antigen binding protein e.g. antibody
  • binding assays can be used to test whether "substantially homologous" antigen binding proteins (e.g.
  • binding assays such as competition assays or ELISA assays, e.g. as described elsewhere herein.
  • Surface Plasmon Resonance (e.g. BIAcore) assays could also readily be used to establish whether "substantially homologous" antigen binding proteins can bind to the relevant antigen.
  • BIAcore Surface Plasmon Resonance
  • a competition binding assay can be used to test whether "substantially homologous" antibodies retain the ability to bind to, or specifically bind to, substantially the same epitope of the relevant antigen as recognized by the antigen binding proteins of the invention (e.g. the 107 antibody or the 206 antibody), or have the ability to compete with one or more of the various antigen binding proteins of the invention.
  • the method described below is only one example of a suitable competition assay. The skilled person will be aware of other suitable methods and variations.
  • An exemplary competition assay involves assessing the binding of various effective concentrations of an antigen binding protein of the invention to the relevant antigen in the presence of varying concentrations of a test antigen binding protein (e.g. a substantially homologous antigen binding protein e.g. antibody). The amount of inhibition of binding induced by the test antigen binding protein can then be assessed.
  • a test antigen binding protein that shows increased competition with an antigen binding protein of the invention at increasing concentrations i.e. increasing concentrations of the test antigen binding protein result in a corresponding reduction in the amount of antigen binding protein of the invention binding to the relevant antigen
  • the test antigen binding protein significantly reduces the amount of antigen binding protein of the invention that binds to the relevant antigen.
  • the test antigen binding protein reduces the amount of antigen binding protein of the invention that binds to the relevant antigen by at least about 95%.
  • ELISA and flow cytometry assays may be used for assessing inhibition of binding in such a competition assay but other suitable techniques would be well known to a person skilled in the art.
  • “substantially homologous” antigen binding proteins which retain the ability to bind to, or specifically bind to, substantially the same (or the same) epitope of the relevant antigen as recognized by antigen binding proteins of the invention (e.g. the 107 or 206 antibodies) or which have the ability to compete with one or more of the various antigen binding proteins of the invention (e.g. the 107 or 2016 antibodies) are preferred.
  • Competing antigen binding protein refers to antigen binding proteins that bind to about, substantially or essentially the same, or even the same, epitope as a "reference antigen binding protein”. Competing antigen binding proteins are thus able to effectively compete with a reference antibody for binding to the relevant antigen.
  • the competing antigen binding protein can bind to the same epitope as the reference antigen binding protein.
  • the competing antigen binding protein preferably has the same epitope specificity as the reference antigen binding protein.
  • reference antigen binding proteins are antigen binding proteins which can bind to the relevant antigen in accordance with the invention.
  • reference antigen binding proteins have a VH and a VL domain as defined herein.
  • a reference antigen binding protein which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1 a may comprise a VL domain an a VH domain of the 107 antibody (i.e.
  • a reference antigen binding protein which binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 may comprise a VL domain an a VH domain of the 206 antibody (i.e. comprise a VL domain of SEQ ID NO:166 and a VH domain of SEQ ID NO: 165) .
  • a preferred reference antigen binding protein may be the 107 antibody or the 206 antibody as defined herein.
  • competing antigen binding proteins e.g. antibodies
  • reference antibodies such as the 107 antibody and the 206 antibody
  • the identification of competing antigen binding proteins is determined in comparison to a reference antigen binding protein (e.g. antibody)
  • epitope mapping can be performed using standard techniques, if desired.
  • Substantially homologous sequences of proteins of the invention include, without limitation, conservative amino acid substitutions, or for example alterations that do not affect the VH, VL or CDR domains of the antibodies, e.g. antibodies where tag sequences, toxins or other components are added that do not contribute to the binding of antigen, or alterations to convert one type or format of antibody molecule or fragment to another type or format of antibody molecule or fragment (e.g. conversion from Fab to scFv or whole antibody or vice versa), or the conversion of an antibody molecule to a particular class or subclass of antibody molecule (e.g. the conversion of an antibody molecule to IgG or a subclass thereof, e.g. lgG 2 ).
  • conservative amino acid substitutions or for example alterations that do not affect the VH, VL or CDR domains of the antibodies, e.g. antibodies where tag sequences, toxins or other components are added that do not contribute to the binding of antigen, or alterations to convert one type or format of antibody
  • a “conservative amino acid substitution”, as used herein, is one in which the amino acid residue is replaced with another amino acid residue having a similar side chain.
  • Families of amino acid residues having similar side chains have been defined in the art, including basic side chains (e.g. lysine, arginine, histidine), acidic side chains (e.g. aspartic acid, glutamic acid), uncharged polar side chains (e.g. glycine, asparagine, glutamine, serine, threonine, tyrosine, cysteine), nonpolar side chains (e.g.
  • Homology may be assessed by any convenient method. However, for determining the degree of homology between sequences, computer programs that make multiple alignments of sequences are useful, for instance Clustal W
  • the Clustal W algorithm can be used together with BLOSUM 62 scoring matrix (Henikoff and Henikoff, Proc. Natl. Acad. Sci. USA, 89:10915-10919, 1992) and a gap opening penalty of 10 and gap extension penalty of 0.1 , so that the highest order match is obtained between two sequences wherein at least 50% of the total length of one of the sequences is involved in the alignment.
  • BLOSUM 62 scoring matrix Henikoff and Henikoff, Proc. Natl. Acad. Sci. USA, 89:10915-10919, 1992
  • gap opening penalty 10
  • gap extension penalty 10
  • Other methods that may be used to align sequences are the alignment method of Needleman and Wunsch (Needleman and Wunsch, J. Mol.
  • sequences according to the present invention having 65%, 70%, 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98% or 99% homology, sequence identity etc. may be determined using the ALIGN program with default parameters (for instance available on Internet at the GENESTREAM network server, IGH, adjoin, France).
  • the present invention provides antigen binding proteins (e.g. antibodies) that bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a1a and antigen binding proteins (e.g. antibodies) that bind to, or specifically bind to, HLA- DQ2.5:DQ2.5-glia-a2.
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins e.g. antibodies
  • HLA-DQ2.5 (encoded by DQA1 * 05 and DQB1 * 02 ) is specific type of MHC Class 2 molecule that has a strong association with celiac disease.
  • HLA-DQ2.5 comprises a a-chain (typically having an cq domain and an a 2 domain and typically encoded by DQA1 * 05 ) and a b-chain (typically having a bi domain and a b 2 domain and typically encoded by DQB1 * 02).
  • Amino acid sequences of the a- and b- chains of HLA-DQ2.5 are set forth herein (the a-chain sequence is set forth in SEQ ID NO:493; the b- chain sequence is set forth in SEQ ID NO:494).
  • HLA-DQ2.5 can present gliadin epitopes, for example epitopes of a-gliadin, for example DQ2.5-glia-a1 a and DQ2.5-glia-a2.
  • the amino acid sequence of the deamidated DQ2.5-glia-a1a epitope is set forth in SEQ ID NO:472.
  • the amino acid sequence of the deamidated DQ2.5-glia-a2 epitope is set forth in SEQ ID NO:473.
  • These deamidated forms of the DQ2.5-glia-a1 a and DQ2.5-glia-a2 epitopes may be considered to be celiac disease-associated forms of DQ2.5-glia-a1 a and DQ2.5- glia-a2 epitopes.
  • a-gliadin typically present on a proteolysis resistant a-gliadin 33-mer peptide (SEQ ID NO:476).
  • antigen binding proteins e.g.
  • antibodies of the invention can bind to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA- DQ2.5:DQ2.5-glia-a2 when the DQ2.5-glia-a1 a or DQ2.5-glia-a2 epitope is not comprised within (i.e. is not in the context of) the proteolysis resistant a-gliadin 33- mer peptide.
  • the a-gliadin 33-mer peptide can associate with (or bind to) HLA-DQ2.5, the binding groove (or binding pocket) of the HLA-DQ2.5 molecule (i.e. the MHC molecule) can only present, or accommodate, a single 9-mer epitope (e.g.
  • HLA-DQ2.5 may also present, or accommodate, epitopes of other gliadins, for example w-gliadin (e.g. DQ2.5-glia-u>1 (SEQ ID NO:477) or DQ2.5-glia-u>2 (SEQ ID NO:478)).
  • the non- disease associated form of the DQ2.5-glia-a1a epitope (or“native” form or non-deamidated form is set forth in SEQ ID NO:491 ).
  • the non- disease associated form of the DQ2.5-glia-a2 epitope (or“native” form or non-deamidated form) is set forth in SEQ ID NO:492.
  • DQ2.5-glia-a1a includes the disease associated form of the epitope (deamidated form) of SEQ ID NO:472 and the non-disease associated form of the epitope (non-deamidated form or native form) of SEQ ID NO:491.
  • DQ2.5-glia-a2 includes the disease associated form of the epitope (deamidated form) of SEQ ID NO:473 and the non-disease associated form of the epitope (non-deamidated form or native form) of SEQ ID NO:492.
  • the non-disease associated forms of the epitopes may also be present on a proteolysis resistant a-gliadin 33-mer peptide.
  • an antigen binding protein which binds to, or binds specifically to, HLA-DQ2.5:DQ2.5-glia-a1a does not bind to (or cross-react with), or does not significantly bind to (or cross-react with), a HLA-DQ2.5:DQ2.5-glia-a1 a complex in which the DQ2.5-glia-a1a epitope sequence has a Q residue instead of an E residue at position 6 of the 9-mer.
  • an antigen binding protein which binds to, or binds specifically to, HLA-DQ2.5:DQ2.5-glia-a1 a does not bind to (or cross-react with), or does not significantly bind to (or cross-react with), a HLA-DQ2.5 complex presenting a DQ2.5-glia-a1 a epitope of SEQ ID NO:491.
  • an antigen binding protein which binds to, or binds specifically to, HLA-DQ2.5:DQ2.5-glia-a1a does not bind to (or cross-react with), or does not significantly bind to (or cross-react with), a HLA-DQ2.5 complex presenting a native or non-deamidated form of DQ2.5-glia-a1a.
  • the DQ2.5-glia-a1a epitope of SEQ ID NO:472 represents a deamidated form of the DQ2.5-glia-a1a epitope and may be
  • an antigen binding protein that binds to, or specifically binds to, HLA- DQ2.5:DQ2.5-glia-a1a is specific for the disease associated form (or version) of the DQ2.5-glia-a1a epitope (SEQ ID NO:472), which may be advantageous (e.g. in celiac disease therapy).
  • the DQ2.5-glia- ala epitope is as set forth in SEQ ID NO:472.
  • an antigen binding protein that binds to, or binds specifically to, HLA-DQ2.5:DQ2.5-glia-a2 may bind to HLA-DQ2.5:DQ2.5-glia-a2 in which the DQ2.5-glia-a2 epitope is as set forth in SEQ ID NO:473 (PQPELPYPQ) and/or a DQ2.5-glia-a2 epitope which has a Q residue instead of an E residue at position 4 of the 9-mer.
  • an antigen binding protein that binds to, or binds specifically to, HLA-DQ2.5:DQ2.5-glia-a2 may bind to HLA- DQ2.5:DQ2.5-glia-a2 in which the DQ2.5-glia-a2 epitope is as set forth SEQ ID NO:473 (PQPELPYPQ) and/or as set forth in SEQ ID NO:492.
  • PQPELPYPQ DQ2.5-glia-a2 epitope
  • an antigen binding protein that binds to, or binds specifically to, HLA- DQ2.5:DQ2.5-glia-a2 may bind to HLA-DQ2.5:DQ2.5-glia-a2 in which the DQ2.5- glia-a2 epitope is as set forth SEQ ID NO:473 (PQPELPYPQ) but not bind (or cross- react), or not significantly bind (or significantly) cross-react, with non-deamidated the DQ2.5-glia-a2 epitope as set forth in SEQ ID NO:492.
  • HLA-DQ2.5:DQ2.5-glia-a1a means a HLA-DQ2.5 molecule that is presenting (or“loaded” with) a DQ2.5-glia-a1 a epitope.
  • HLA-DQ2.5:DQ2.5- glia-a1a means a HLA-DQ2.5-peptide complex (pMHC) in which the DQ2.5-glia-a1a epitope is presented in the antigen binding groove (or accommodated in the antigen binding groove).
  • HLA-DQ2.5:DQ2.5-glia-a2 means a HLA-DQ2.5 molecule that is presenting (or“loaded” with) a DQ2.5-glia-a2 epitope.
  • HLA-DQ2.5:DQ2.5- glia-a2 means a HLA-DQ2.5-peptide complex (pMHC) in which the DQ2.5-glia-a2 epitope is presented in the antigen binding groove (or accommodated in the antigen binding groove).
  • the invention provides antigen binding proteins (e.g. antibodies) that bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a1 a.
  • antigen binding proteins e.g. antibodies
  • that specifically binds to HLA-DQ2.5:DQ2.5-glia-a1a in the context of antigen binding proteins means those antigen binding proteins that are capable of binding to HLA-DQ2.5:DQ2.5-glia-a1a and which do not cross-react (or do not bind) or do not significantly cross-react (or do not significantly bind) HLA- DQ2.5:DQ2.5-glia-a2.
  • an antigen binding protein which “binds specifically to HLA-DQ2.5:DQ2.5-glia-a1a” in accordance with the present invention also does not cross-react with other HLA-DQ2.5:DQ2.5-glia complexes (antigens) or non-HLA-DQ2.5:DQ2.5-glia complexes (antigens).
  • antigen binding proteins e.g. antibodies
  • the term“bind to” is broader than the term“specifically bind to”.
  • antigen binding proteins e.g. antibodies
  • HLA-DQ2.5:DQ2.5-glia-a1a may have a degree of promiscuity (or cross-reactivity) in relation to the HLA-DQ2.5:epitope bound, for example they may in some embodiments cross-react (or bind) with other peptides, for example other peptides presented by HLA-DQ2.5 (e.g. other celiac disease associated peptides, or other gliadin or gliadin-derived peptides, or variants of gliadin derived peptides, or other gluten-derived peptides).
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins that bind to HLA-DQ2.5:DQ2.5-glia-a1a do not cross-react (or do not bind) or do not significantly cross-react (or do not significantly bind) with
  • HLA-DQ2.5:DQ2.5-glia-a1a antibodies exemplified herein are examples of antigen binding proteins that bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a1a.
  • the invention provides antigen binding proteins (e.g. antibodies) that bind to, specifically bind to, HLA-DQ2.5:DQ2.5-glia-a2.
  • antigen binding proteins e.g. antibodies
  • that specifically binds to HLA-DQ2.5:DQ2.5-glia-a2 in the context of antigen binding proteins means those antigen binding proteins that are capable of binding to HLA-DQ2.5:DQ2.5-glia-a2 and which do not cross-react (or do not bind) or do not significantly cross-react (or do not significantly bind) HLA-DQ2.5:DQ2.5- glia-a1a.
  • HLA-DQ2.5:DQ2.5-glia-a2 in accordance with the present invention also does not cross-react with other HLA-DQ2.5:DQ2.5-glia complexes (antigens) or non-HLA-DQ2.5:DQ2.5-glia complexes (antigens).
  • antigen binding proteins e.g. antibodies“bind to” HLA-DQ2.5:DQ2.5-glia-a2 but do not“specifically bind to” HLA-DQ2.5:DQ2.5-glia- a2.
  • the term“bind to” is broader than the term“specifically bind to”.
  • antigen binding proteins (e.g. antibodies) that bind to HLA- DQ2.5:DQ2.5-glia-a2 may have a degree of promiscuity (or cross-reactivity) in relation to the HLA-DQ2.5:epitope bound, for example they may in some
  • embodiments cross-react (or bind) with other peptides, for example other peptides presented by HLA-DQ2.5 (e.g. other celiac disease associated peptides, or other gliadin peptides or gliadin-derived peptides, or variants of gliadin derived peptides, or other gluten-derived peptides).
  • HLA-DQ2.5 e.g. other celiac disease associated peptides, or other gliadin peptides or gliadin-derived peptides, or variants of gliadin derived peptides, or other gluten-derived peptides.
  • antigen binding proteins e.g. antibodies
  • that bind to HLA-DQ2.5:DQ2.5-glia-a2 do not cross-react (or do not bind) or do not significantly cross-react (or do not significantly bind) with
  • HLA-DQ2.5:DQ2.5-glia-a2 antibodies exemplified herein are examples of antigen binding proteins that bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a2.
  • a given antigen binding protein can bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a1a, or can bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a2 and any appropriate method or technique can be used, for example an ELISA assay or a surface plasmon resonance assay.
  • the HLA-DQ2.5:DQ2.5-glia-a1a is a recombinant soluble molecule in which a glia-a1a epitope (or peptide), for example in the context of SEQ ID NO:474, is covalently attached to the HLA-DQ2.5 (MHC) molecule.
  • a glia-a1a epitope or peptide
  • MHC HLA-DQ2.5
  • recombinant soluble molecules may be made by any appropriate means, for example as described in Example 1 herein (and by Fallang et al., 2008 and
  • the HLA-DQ2.5:DQ2.5-glia-a2 is a recombinant soluble molecule in which a glia-a2 epitope (or peptide), for example in the context of SEQ ID NO:475, is covalently attached to the HLA-DQ2.5 (MHC) molecule.
  • a glia-a2 epitope or peptide
  • MHC HLA-DQ2.5
  • Such recombinant soluble molecules may be made by any appropriate means, for example as described in Example 1 herein (and by Fallang et al. 2008 and
  • the HLA-DQ2.5:DQ2.5-glia-a1a is on cells (e.g. DQ2.5 + dendritic cells) that have been loaded with a soluble DQ-2.5-glia-a1a epitope (or peptide), for example in the context of SEQ ID NO:474, e.g. by contacting the cells with a soluble DQ-2.5-glia-a1a epitope (or peptide), for example in the context of SEQ ID NO:474, e.g. as described in the Example section herein.
  • cells e.g. DQ2.5 + dendritic cells
  • a soluble DQ-2.5-glia-a1a epitope or peptide
  • the HLA-DQ2.5:DQ2.5-glia-a1a does not have a DQ- 2.5-glia-a1a epitope (or peptide) covalently attached to the HLA-DQ2.5 molecule.
  • the HLA-DQ2.5:DQ2.5-glia-a2 is on cells (e.g.
  • the HLA- DQ2.5 + dendritic cells that have been loaded with a soluble DQ-2.5-glia-a2 epitope (or peptide), for example in the context of SEQ ID NO:475, e.g. by contacting the cells with a soluble DQ-2.5-glia-a2 epitope (or peptide), for example in the context of SEQ ID NO:475, e.g. analogously to as described in the Example section herein in relation to HLA-DQ2.5:DQ2.5-glia-a1 a.
  • the HLA- DQ2.5:DQ2.5-glia-a2 does not have a DQ-2.5-glia-a2 epitope (or peptide) covalently attached to the HLA-DQ2.5 molecule.
  • the antigen binding proteins of the invention bind to their antigen (HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2) with a binding affinity (K D ) of 10mM or less (e.g. 0.1 nM to 10mM), preferably 5mM or less, or 4mM or less, or 3mM or less, or 2mM or less, or 1 mM or less.
  • K D binding affinity
  • the antigen binding proteins of the invention bind to their antigen (HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2) with a binding affinity (K D ) of 500nM or less (e.g. 0.1 nM to 500nM), or 400nM or less, or 300nM or less, or 200nM or less, more preferably 100nM or less.
  • K D binding affinity
  • the antigen binding proteins of the invention bind to their antigen (HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2) with a binding affinity (K D ) of 100nM or less (e.g. 0.1 nM to 100nM), preferably 90nM or less, 80nM or less, 70nM or less, 60nM or less, 50nM or less, 40nM or less, 30nM or less, 20nM or less (e.g. 20, 19, 18, 17, 16, 15, 14, 13, 12, 1 1 , 10, 9, 8, 7, 6, 5,
  • K D binding affinity
  • the antigen binding proteins of the invention bind to their antigen (HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2) with a binding affinity (K D ) of 1 nM or less (e.g.
  • the HLA-DQ2.5:DQ2.5-glia-a1 a antigen binding proteins of the invention bind to their antigen (HLA-DQ2.5:DQ2.5-glia-a1 a) with a binding affinity (K D ) that is less than 74nM, preferably 70nM or less, or 60nM or less, or 50nM or less, or 40nM or less, or 30nM or less, or 20nM or less, or 10nM or less, or 5nM or less, or 2nM or less, or 1 nM or less).
  • K D binding affinity
  • the HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention bind to their antigen (HLA-DQ2.5:DQ2.5-glia-a2) with a binding affinity (K D ) that is less than 20nM, preferably 15nM or less, or 10nM or less, or 5nM or less, or 2nM or less, or 1 nM or less.
  • K D binding affinity
  • the above-mentioned affinities and affinity range values apply when the antigen binding protein is an antibody or antigen binding fragment thereof.
  • the above-mentioned affinities and affinity range values apply when the antigen binding protein is a scFv (i.e. an antibody in the scFv format or in the Fab format).
  • Binding affinities may be determined by any appropriate means, an exemplary and preferred method being to use surface plasmon resonance (SPR), e.g. BIAcore, for example as described in the Example section herein.
  • SPR surface plasmon resonance
  • the binding affinities are as determined using SPR (e.g. BIAcore) single-cycle kinetic analysis (single-cycle kinetic method), for example using a protocol as described in Example 1 herein.
  • binding affinities e.g. of Fab fragments
  • SPR e.g. BIAcore
  • multi-cycle analysis multi-cycle kinetic method
  • the HLA-DQ2.5:DQ2.5-glia-a1a antigen binding proteins of the invention bind to their antigen (HLA- DQ2.5:DQ2.5-glia-a1a) with a binding affinity that is higher (or improved), preferably significantly higher, than the binding affinity for HLA-DQ2.5:DQ2.5-glia-a1a of the specifically described R2A1-8E, R3A2-9F or R4A1-3A (107) antibodies.
  • the R2A1- 8E antibody is characterised by a VL domain of SEQ ID NO:4 and a VH domain of SEQ ID NO:3;
  • the R3A2-9F antibody is characterised by a VL domain of SEQ ID NO:22 and a VH domain of SEQ ID NO:21 ;
  • the R4A1-3A (107) antibody is characterised by a VL domain of SEQ ID NO:40 and a VH domain of SEQ ID NO:39.
  • a higher (or improved) binding affinity is characterised by a K D (equilibrium dissociation constant) value (e.g. in nM) that is lower.
  • the HLA-DQ2.5:DQ2.5-glia-a1 a antigen binding proteins of the invention e.g. antibodies
  • the HLA-DQ2.5:DQ2.5-glia-a1 a antigen binding proteins of the invention e.g. antibodies
  • a significantly higher affinity may be any meaningfully improved affinity, for example an affinity that is at least 2-fold, 3-fold, 4-fold, 5-fold, 10-fold, 20-fold higher, 50-fold higher or 100-fold higher than the binding affinity of the specifically described R2A1-8E, R3A2-9F or R4A1-3A (107) antibodies (preferably the R4A1-3A (107) antibody).
  • a significantly higher affinity may be characterised by an affinity value (e.g.
  • K D in nM that is at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90% or at least 95% lower than the affinity value of the specifically described R2A1 -8E, R3A2-9F or R4A1 -3A (107) antibodies (preferably the R4A1 -3A (107) antibody).
  • the HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention bind to their antigen (HLA- DQ2.5:DQ2.5-glia-a2) with a binding affinity that is higher, preferably significantly higher, than the binding affinity for HLA-DQ2.5:DQ2.5-glia-a2 of the specifically described 206, 217, 218, 220, 221 , 223, 226 or 228 antibodies.
  • the 206 antibody is characterised by a VL domain of SEQ ID NO:166 and a VH domain of SEQ ID NO:165;
  • the 217 antibody is characterised by a VL domain of SEQ ID NO:184 and a VH domain of SEQ ID NO:183;
  • the 218 antibody is characterised by a VL domain of SEQ ID NO:202 and a VH domain of SEQ ID NO:201 ;
  • the 220 antibody is characterised by a VL domain of SEQ ID NO:220 and a VH domain of SEQ ID NO:219;
  • the 221 antibody is characterised by a VL domain of SEQ ID NO:238 and a VH domain of SEQ ID NO:237;
  • the 223 antibody is characterised by a VL domain of SEQ ID NO:256 and a VH domain of SEQ ID NO:255;
  • the 226 antibody is characterised by a VL domain of SEQ ID NO:274 and a VH domain of SEQ ID NO:
  • K D equilibrium dissociation constant
  • the HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention e.g. antibodies
  • the HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention e.g. antibodies
  • a significantly higher affinity may be any meaningfully improved affinity, for example an affinity that is at least 2-fold, 3-fold, 4-fold, 5-fold, 10-fold, 20-fold, 50- fold or 100-fold higher than the binding affinity of the specifically described 206, 217, 218, 220, 221 , 223, 226 or 228 antibodies (preferably the 206 antibody).
  • a significantly higher affinity may be characterised by an affinity value (e.g.
  • K D in nM that is at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90% or at least 95% lower than the affinity value of the specifically described 206, 217, 218, 220, 221 , 223, 226 or 228 antibodies (preferably the 206 antibody).
  • a binding affinity value (e.g. K D in nM) may be determined for an antigen binding protein (e.g. antibody) that may have a higher affinity for the relevant antigen than the specifically described R2A1-8E, R3A2-9F, R4A1-3A (107), 206, 217, 218, 220, 221 , 223, 226 or 228 antibodies, it is not necessary to determine such a binding affinity value (e.g. K D in nM) in order to determine whether or not there is a higher binding affinity.
  • an antigen binding protein e.g. antibody
  • HLA-DQ2.5:DQ2.5-glia-a1a antigen binding proteins of the invention e.g. antibodies
  • antigen binding proteins of the invention have a K off (or“off-rate”) (s 1 ) for HLA-DQ2.5:DQ2.5- glia-a1a that is between about 0.05 and 1x10 7 ).
  • HLA-DQ2.5:DQ2.5-glia-a1a antigen binding proteins of the invention e.g. antibodies
  • antigen binding proteins e.g.
  • antibodies) of the present invention have a K off (or“off- rate”) (s 1 ) for HLA-DQ2.5:DQ2.5-glia-a1a that is at least 50%, at least 75%, at least 80%, at least 85%, at least 90% or at least 95% lower than the K off (or“off-rate”) (s 1 ) for HLA-DQ2.5:DQ2.5-glia-a1 a of the 107 antibody of the invention (e.g. when antibodies are in the Fab format).
  • K off or“off- rate”
  • HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention e.g. antibodies
  • antigen binding proteins of the invention have a K off (or“off-rate”) (s 1 ) for HLA-DQ2.5:DQ2.5-glia-a2 that is between about 0.5 and 1 x10 7 ).
  • HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention e.g. antibodies
  • K off or“off-rate” or dissociation constant
  • antibodies of the present invention have a K off (or“off-rate”) (s 1 ) for HLA-DQ2.5:DQ2.5-glia-a2 that is at least 50%, at least 75%, at least 80%, at least 85%, at least 90% or at least 95% lower than the K off (or“off-rate”) (s 1 ) for HLA-DQ2.5:DQ2.5-glia-a2 of the 206 antibody of the invention (e.g. when antibodies are in the Fab format).
  • K off or“off-rate”
  • K off may be determined by any suitable method and the skilled person is familiar with these.
  • K off or“off-rate” can be determined in a Surface Plasmon Resonance assay (e.g. BIAcore assay), e.g. as described in the Example section herein.
  • BIAcore assay Surface Plasmon Resonance assay
  • the above discussion of“off-rates” applies when the antigen binding protein is in the Fab format.
  • certain preferred antibodies of the invention have a lower (or slower)“off-rate” (K off or dissociation constant) than antibodies 107 or 206). Differing off-rates can lead to differences in pharmacokinetics. Without wishing to be bound by theory, antibodies with lower off-rates may be particularly beneficial as they may sit more tightly on the target antigen and thus may be more effective, e.g. at inhibiting T-cell activation.
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins do not bind (or do not significantly bind) to the soluble form of the respective gluten-derived peptide.
  • HLA-DQ2.5:DQ2.5-glia-a1 a antigen binding proteins do not significantly bind (or do not bind) to a soluble DQ2.5-glia-a1 a epitope.
  • HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins do not significantly bind (or do not bind) to a soluble DQ2.5-glia-a2 epitope.
  • antigen binding proteins e.g.
  • antibodies of the invention do not bind (or do not significantly bind) to the respective gluten-derived peptide unless the peptide is presented by a HLA- DQ2.5 complex.
  • Determination of whether or not a given antigen binding protein can significantly bind to the soluble form of DQ2.5-glia-a1 a or DQ2.5-glia-a2 can be done by any appropriate means, e.g. a competition assay such as a competition ELISA assay, e.g. as described in the Example section herein.
  • HLA-DQ2.5:DQ2.5-glia-a1a antigen binding proteins of the invention typically bind to, or specifically bind to, the DQ2.5-glia-a1a epitope (or peptide), solely (or strictly) in the context of the MHC, i.e. HLA-DQ2.5.
  • This may be assessed by any appropriate means, for example by a competition ELISA, for example as set forth in the Example section herein.
  • HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins of the invention typically bind to, or specifically bind to, the DQ2.5-glia-a2 epitope (or peptide), solely (or strictly) in the context of the MHC, i.e. HLA-DQ2.5.
  • This may be assessed by any appropriate means, for example by a competition ELISA, for example a competition ELISA modified from the Example section herein.
  • HLA-DQ2.5:DQ2.5-glia-a1a antigen binding proteins do not specifically bind to the HLA-DQ2.5 molecule itself (i.e. the MHC molecule itself), e.g. in the absence of a presented DQ2.5-glia-a1a epitope.
  • HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins do not specifically bind to the HLA-DQ2.5 molecule itself (i.e. the MHC molecule itself), e.g. in the absence of a presented DQ2.5-glia-a2 epitope.
  • antigen binding proteins of the present invention do not bind to an“unloaded” HLA-DQ2.5 molecule.
  • an antigen binding protein which“binds specifically to HLA-DQ2.5:DQ2.5-glia-a1a” in accordance with the present invention does not bind (or cross-react), or does not significantly bind or (significantly cross-react) to other HLA-DQ2.5:DQ2.5-glia complexes (antigens).
  • antigen binding proteins which bind specifically to HLA-DQ2.5:DQ2.5-glia-a1a do not bind (or cross-react), or do not significantly bind (or significantly cross-react) to HLA-DQ2.5:DQ2.5-glia-y1 , HLA-DQ2.5:DQ2.5-glia- y2, HLA-DQ2.5:DQ2.5-glia-y3, HLA-DQ2.5:DQ2.5-glia-y4c, HLA-DQ2.5:DQ2.5-glia- w1 , HLA-DQ2.5:DQ2.5-glia-oo2 or HLA-DQ2.5:DQ2.5-glia-a2.
  • antigen binding proteins which bind specifically to HLA- DQ2.5:DQ2.5-glia-a1a do not bind (or cross-react), or do not significantly bind (or significantly cross-react) to HLA-DQ2.5:CLIP2.
  • antigen binding proteins which bind specifically to HLA-DQ2.5:DQ2.5-glia-a1a do not bind (or cross-react), or do not significantly bind (or significantly cross-react) to HLA- DQ2.5:DQ2.5-hor3.
  • HLA-DQ2.5:DQ2.5-glia complexes antigens
  • HLA-DQ2.5-CLIP2 or HLA-DQ2.5:DQ2.5-hor-3 can be assessed by any appropriate means, for example using an ELISA assay as described in the Example section herein.
  • an antigen binding protein which“binds to HLA- DQ2.5:DQ2.5-glia-a1 a” in accordance with the present invention also does not bind (or does not significantly bind) to one or more (or all) of HLA-DQ2.5:DQ2.5-glia-Yl , HLA-DQ2.5:DQ2.5-glia-y2, HLA-DQ2.5:DQ2.5-glia-y3, HLA-DQ2.5:DQ2.5-glia-y4c, HLA-DQ2.5:DQ2.5-glia-u>1 , HLA-DQ2.5:DQ2.5-glia-oo2, HLA-DQ2.5:DQ2.5-glia-a2, HLA-DQ2.5:CLIP2 or HLA-DQ2.5:DQ2.5-hor-3.
  • an antigen binding protein which“binds specifically to HLA-DQ2.5:DQ2.5-glia-a2” in accordance with the present invention does not bind (or cross-react), or does not significantly bind or (significantly cross-react) to other HLA-DQ2.5:DQ2.5-glia complexes (antigens).
  • antigen binding proteins which bind specifically to HLA- DQ2.5:DQ2.5-glia-a2 do not bind (or cross-react), or do not significantly bind (or significantly cross-react) to HLA-DQ2.5:DQ2.5-glia-y1 , HLA-DQ2.5:DQ2.5-glia-y2, HLA-DQ2.5:DQ2.5-glia-y3, HLA-DQ2.5:DQ2.5-glia-y4c, HLA-DQ2.5:DQ2.5-glia-oo1 , HLA-DQ2.5:DQ2.5-glia-oo2 or HLA-DQ2.5:DQ2.5-glia-a1 a.
  • antigen binding proteins which bind specifically to HLA-DQ2.5:DQ2.5-glia-a2 do not bind (or cross-react), or do not significantly bind (or significantly cross-react) to HLA- DQ2.5:CLIP2 or HLA-DQ2.5:DQ2.5-hor-3. Whether or not a given antigen binding protein cross-reacts with these other HLA-DQ2.5:DQ2.5-glia complexes (antigens) or HLA-DQ2.5-CLIP2 or HLA-DQ2.5:DQ2.5-hor-3 can be assessed by any appropriate means, for example using an ELISA assay as described in the Example section herein.
  • an antigen binding protein which“binds to HLA- DQ2.5:DQ2.5-glia-a2” in accordance with the present invention also does not bind (or does not significantly bind) to one or more (or all) of HLA-DQ2.5:DQ2.5-glia-y1 , HLA-DQ2.5:DQ2.5-glia-y2, HLA-DQ2.5:DQ2.5-glia-y3, HLA-DQ2.5:DQ2.5-glia-y4c, HLA-DQ2.5:DQ2.5-glia-u>1 , HLA-DQ2.5:DQ2.5-glia-u>2, HLA-DQ2.5:DQ2.5-glia- a1 a, HLA-DQ2.5:CLIP2 or HLA-DQ2.5:DQ2.5-hor-3.
  • an antigen binding protein which binds to, or binds specifically to, HLA-DQ2.5:DQ2.5-glia-a1 a or which binds to, or binds specifically to, HLA-DQ2.5:DQ2.5-glia-a2 binds to the respective HLA-DQ2.5:DQ2.5-glia peptide complex when said complex is present on (or in) cells (or is expressed on or in cells, or has been transduced into cells), e.g. murine A20 B cells.
  • the cells have been transduced with HLA-DQ2.5 covalently linked to a DQ2.5-glia- al a epitope (or peptide) or a DQ2.5-glia-a2 epitope (or peptide), e.g. as described in the Example section herein.
  • Binding to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA- DQ2.5:DQ2.5-glia-a2 on or in cells can be assessed by any appropriate means, e.g. by flow cytometry, for example as described in the Example section herein.
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a1a are capable of binding to HLA-DQ2.5 + cells that are loaded with soluble DQ2.5-glia-a1a peptide.
  • the cells are HLA-DQ2.5 + dendritic cells (DCs), for example HLA- DQ2.5 + dendritic cells derived from a donor (e.g. a human donor).
  • DCs dendritic cells
  • the cells are HLA-DQ2.5 + monocyte-derived dendritic cells derived (or obtained) via in vitro differentiation of PBMCs (peripheral blood mononuclear cells) from a HLA-DQ2.5 + donor.
  • PBMCs peripheral blood mononuclear cells
  • HLA-DQ2.5 + dendritic cells may be loaded with a soluble DQ2.5-glia-a1 a peptide by any appropriate means, for example by supplementation of the culture media with a HLADQ2.5-glia-a1 a peptide (e.g. SEQ ID NO:474), for example with 40mM peptide, during the DC maturation process.
  • a HLADQ2.5-glia-a1 a peptide e.g. SEQ ID NO:474
  • 40mM peptide 40mM peptide
  • An exemplary and preferred method is set out in the Example section.
  • Assessment of whether a given antigen binding protein is capable of binding to HLA-DQ2.5 + cells (e.g. HLA- DQ2.5 + dendritic cells) that are loaded with soluble DQ2.5-glia-a1 a peptide may be done by any appropriate method, but flow cytometry is typically preferred, e.g. as described in the Example section.
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a2 are capable of binding to HLA-DQ2.5 + cells that are loaded with soluble DQ2.5-glia-a2 peptide.
  • the cells are HLA-DQ2.5 + dendritic cells (DCs), for example as described above.
  • HLA-DQ2.5 + dendritic cells may be loaded with a soluble DQ2.5- glia-a2 peptide by any appropriate means, for example by supplementation of the culture media with a HLADQ2.5-glia-a2 peptide (e.g. SEQ ID NO:475), for example with 40mM peptide, during the DC maturation process.
  • An exemplary and preferred method is set out in the Example section.
  • Assessment of whether a given antigen binding protein is capable of binding to HLA-DQ2.5 + cells (e.g. HLA-DQ2.5 + dendritic cells) that are loaded with soluble DQ2.5-glia-a2 peptide may be done by any appropriate method, but flow cytometry is typically preferred, e.g. as described in the Example section.
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a1 a are capable of binding to HLA- DQ2.5:DQ2.5-glia-a1a on cells (e.g. single-cell suspensions) isolated from intestinal (e.g. duodenal) biopsies from HLA-DQ2.5 + individuals (human subjects, e.g. with a Marsh score of 3A, 3B or 3C) that have fed on gluten-containing food and thereby have generated a DQ2.5-glia-a1a epitope (native or deamidated).
  • cells e.g. single-cell suspensions
  • intestinal biopsies from HLA-DQ2.5 + individuals human subjects, e.g. with a Marsh score of 3A, 3B or 3C
  • Such individuals may be confirmed or non-confirmed celiacs, treated or non-treated (or inadequately treated in the sense that they have trace presentation of the pMHC).
  • the individual is an untreated celiac disease subject (a subject not on a gluten-free diet).
  • the cells are B cells (CD19 + CD38 ) or plasma cells, PCs (CD27 + CD38 + ). Isolation of cells from intestinal (e.g.
  • duodenal biopsies may be done by any suitable method.
  • An exemplary method is described in the example section herein.
  • Assessment of whether a given antibody is capable of binding to HLA-DQ2.5:DQ2.5-glia-a1a on such cells from intestinal biopsies may be done by any appropriate method, but flow cytometry is typically preferred, e.g. as described in the Example section.
  • Small intestinal plasma cells can be separated into three major subsets based on CD45 expression; CD19 + CD45 + , CD19 CD45 + and CD19 CD45 ⁇
  • antigen binding proteins that bind to, or bind specifically to, HLA- DQ2.5:DQ2.5-glia-a1a are capable of binding to plasma cells in each of these cell populations.
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a2 are capable of binding to HLA- DQ2.5:DQ2.5-glia-a2 on cells (e.g. single-cell suspensions) isolated from intestinal (e.g. duodenal) biopsies from HLA-DQ2.5 + individuals (human subjects, e.g. with a Marsh score of 3A, 3B or 3C) that have fed on gluten-containing food and thereby have generated an DQ2.5-glia-a2 epitope (native or deamidated).
  • cells e.g. single-cell suspensions
  • intestinal biopsies from HLA-DQ2.5 + individuals (human subjects, e.g. with a Marsh score of 3A, 3B or 3C) that have fed on gluten-containing food and thereby have generated an DQ2.5-glia-a2 epitope (native or deamidated).
  • Such individuals may be confirmed or non-confirmed celiacs, treated or non-treated (or inadequately treated in the sense that they have trace presentation of the pMHC).
  • the individual is an untreated celiac disease subject (a subject not on a gluten-free diet).
  • the cells are B cells (CD19 + CD38 ) or plasma cells, PCs (CD27 + CD38 + ).
  • Assessment of whether a given antibody is capable of binding to HLA-DQ2.5:DQ2.5-glia-a2 on such cells from intestinal biopsies may be done by any appropriate method, but flow cytometry is typically preferred, e.g. as described in the Example section.
  • Small intestinal plasma cells can be separated into three major subsets based on CD45 expression; CD19 + CD45 + , CD19 CD45 + and CD19 CD45 ⁇
  • antigen binding proteins that bind to, or bind specifically to, HLA- DQ2.5:DQ2.5-glia-a2 are capable of binding to plasma cells in each of these cell populations.
  • The“Marsh” scoring system is a classification system used in the art to rate (or score) damage to the small intestine. Scores of 0 to 4 may be given, with higher scores representing increased damage.
  • antigen binding proteins e.g. antibodies that bind to HLA-DQ2.5:DQ2.5-glia-a1a or that bind to HLA-DQ2.5:DQ2.5-glia-a2 are capable of inhibiting T-cell activation (e.g. T-cell activation by antigen presenting cells having HLA-DQ2.5:DQ2.5-glia-a1a or HLA-DQ2.5:DQ2.5-glia-a2, as the case may be).
  • antigen binding proteins e.g. antibodies that bind to HLA-DQ2.5:DQ2.5-glia-a1a or that bind to HLA-DQ2.5:DQ2.5-glia-a2 are capable of inhibiting T-cell activation (e.g. T-cell activation by antigen presenting cells having HLA-DQ2.5:DQ2.5-glia-a1a or HLA-DQ2.5:DQ2.5-glia-a2, as the case may be).
  • antigen binding proteins e.g.
  • HLA- DQ2.5:DQ2.5-glia-a1a or that bind to HLA-DQ2.5:DQ2.5-glia-a2 are capable of inhibiting T-cell activation in vitro. This may be assessed by any suitable methods and the skilled person will be familiar with such methods.
  • antigen binding proteins that bind to HLA-DQ2.5:DQ2.5-glia-a1a or that bind to HLA-DQ2.5:DQ2.5-glia-a2 are capable of inhibiting T-cell activation by at least 10%, preferably at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90% or even 100%.
  • 0% inhibition or conversely 100% activation is the degree of inhibition in the absence of an antigen binding protein (e.g. antibody).
  • relative inhibitory capacity (or activity) of an antigen binding protein (e.g. antibody) may be determined by normalizing to the T-cell activation in the absence of antigen binding protein (e.g. antibody), which may be set as 100% activation.
  • inhibition of T-cell activation by an antigen binding protein e.g. antibody
  • an antigen binding protein e.g. antibody
  • DQ2.5 + antigen presenting cells e.g. Raji B-cells
  • APCs antigen presenting cells
  • a DQ2.5-glia-a1a peptide e.g. loading with soluble DQ2.5-glia-a1a peptide
  • typically washing away the unloaded (free) peptide e.g.
  • HLA-DQ2.5:DQ2.5-glia-a1a e.g. 1 mM final concentration of antigen binding protein
  • T-cell clone e.g. SKW3 cells
  • TCR T-cell receptor
  • DQ2.5:DQ2.5-glia-a1a suitable Examples of TCRs are provided in Example 9 herein
  • the antigen binding protein e.g. antibody
  • Determining or measuring T-cell activation e.g. based on an increase or upregulation of CD69, e.g. as assessed by flow cytometry.
  • a particularly preferred method for assessing (or determining or measuring) T-cell activation (and the inhibition of T-cell activation by an antigen binding protein (e.g. antibody) that binds to HLA-DQ2.5:DQ2.5-glia-a1a) is provided in Example 9 herein.
  • an antigen binding protein e.g. antibody
  • inhibition of T-cell activation by an antigen binding protein e.g. antibody
  • an antigen binding protein e.g. antibody
  • DQ2.5 + antigen presenting cells e.g. Raji B-cells
  • APCs antigen presenting cells
  • a DQ2.5-glia-a2 peptide e.g. loading with soluble DQ2.5-glia-a2 peptide
  • typically washing away the unloaded (free) peptide e.g.
  • HLA-DQ2.5:DQ2.5-glia-a2 e.g. 1 mM final concentration of antigen binding protein
  • T-cell clone expressing a T- cell receptor (TCR) that is specific for DQ2.5:DQ2.5-glia-a2 (suitable Examples are provided in Example 9 herein) with the peptide loaded cells that have been contacted with the antigen binding protein (e.g. antibody);
  • T-cell activation e.g. based on an increase or upregulation of CD69, e.g. as assessed by flow cytometry.
  • a particularly preferred method for assessing (or determining or measuring) T-cell activation (and the inhibition of T-cell activation by an antigen binding protein (e.g. antibody) that binds to HLA-DQ2.5:DQ2.5-glia-a2) is provided in Example 9 herein.
  • an antigen binding protein e.g. antibody
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a1a are capable of inhibiting and/or killing cells (e.g. antigen presenting cells such as B cells or plasma cells, for example as defined elsewhere herein) that express or present HLA-DQ2.5:DQ2.5-glia-a1a.
  • cells e.g. antigen presenting cells such as B cells or plasma cells, for example as defined elsewhere herein
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a1a have inhibitory or cytotoxic activity.
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a2 are capable of inhibiting and/or killing cells (e.g. antigen presenting cells such as B cells or plasma cells, for example as defined elsewhere herein) that express or present HLA-DQ2.5:DQ2.5-glia-a2.
  • antigen binding proteins that bind to, or bind specifically to, HLA-DQ2.5:DQ2.5-glia-a2 have inhibitory or cytotoxic activity.
  • antigen binding proteins of the invention that bind specifically to HLA-DQ2.5:DQ2.5-glia-a1 a or bind specifically to HLA-DQ2.5:DQ2.5- glia-a2.
  • antigen binding proteins that do not have the same epitope specificity.
  • antigen binding proteins that bind specifically to HLA-DQ2.5:DQ2.5-glia- ala or that bind specifically to HLA-DQ2.5:DQ2.5-glia-a2 are in certain
  • the invention provides certain antigen binding proteins that show a degree of promiscuity (or cross-reactivity) in relation to the HLA-DQ2.5:DQ2.5-glia epitopes bound.
  • antigen binding proteins that bind to HLA-DQ2.5:DQ2.5-glia- ala may additionally bind to other peptides, for example other peptides presented by HLA-DQ2.5 (e.g. other celiac disease associated peptides, or other gliadin peptides or gliadin-derived peptides, or variants of gliadin derived peptides, or other gluten-derived peptides).
  • antigen binding proteins that bind to HLA-DQ2.5:DQ2.5-glia-a2 may additionally bind to other peptides, for example other peptides presented by HLA-DQ2.5 (e.g. other celiac disease associated peptides, or other gliadin peptides or gliadin-derived peptides, or variants of gliadin derived peptides, or other gluten-derived peptides).
  • HLA-DQ2.5 e.g. other celiac disease associated peptides, or other gliadin peptides or gliadin-derived peptides, or variants of gliadin derived peptides, or other gluten-derived peptides.
  • certain antibodies may bind to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA- DQ2.5:DQ2.5-glia-a2 and additionally bind to one or more of HLA-DQ2.5:DQ2.5- glia-y1 , HLA-DQ2.5:DQ2.5-glia-y2, HLA-DQ2.5:DQ2.5-glia-y3, HLA-DQ2.5:DQ2.5- glia-y4c, HLA-DQ2.5:DQ2.5-glia-oo1 or HLA-DQ2.5:DQ2.5-glia-oo2.
  • Certain antibodies may bind to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 and additionally bind to HLA-DQ2.5:CLIP2 or HLA-DQ2.5:DQ2.5-hor-3. Certain antibodies may bind to HLA-DQ2.5:DQ2.5-glia-a1a and to HLA-DQ2.5:DQ2.5-glia- a2. However, typically and preferably, antigen binding proteins (e.g. antibodies) that bind to HLA-DQ2.5:DQ2.5-glia-a1a do not bind to (or do not significantly bind to) HLA-DQ2.5:DQ2.5-glia-a2.
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins e.g. antibodies
  • HLA-DQ2.5:DQ2.5-glia-a2 do not bind to (or do not significantly bind to) HLA-DQ2.5:DQ2.5-glia-a1a.
  • the present invention provides an antigen binding protein which binds to HLA-DQ2.5:DQ2.5 presenting a peptide (e.g.
  • a celiac disease associated peptide such as a gliadin peptide or a gliadin derived peptide or a gluten-derived peptide
  • said antigen binding protein comprising at least one light chain variable domain and at least one heavy chain variable domain, each domain comprising three complementarity determining regions (CDRs), wherein
  • said antigen binding protein binds to HLA-DQ2.5:DQ2.5-glia-a1a and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • VL variable light
  • VL variable light
  • VL variable light
  • said antigen binding protein binds to HLA-DQ2.5:DQ2.5-glia-a2 and comprises
  • VH variable heavy
  • VH variable heavy
  • VH variable heavy
  • variable light (VL) CDR1 comprising the amino acid sequence of SEQ ID NO:419
  • variable light (VL) CDR2 comprising the amino acid sequence of SEQ ID NO:419
  • VL variable light
  • antigen binding proteins that bind to HLA-DQ2.5:DQ2.5-glia-a1a or to HLA-DQ2.5:DQ2.5- glia-a2 and do not significantly bind to (or do not significantly cross-react with) HLA- DQ2.5 complexes without a gliadin peptide presented. All of the discussion elsewhere herein in relation to, for example, sequences and aspects and preferred embodiments, may be applied, mutatis mutandis, to this aspect of the invention.
  • antigen binding proteins that bind to HLA-DQ2.5:DQ2.5-glia-a1a or to HLA-DQ2.5:DQ2.5- glia-a2 and do not significantly bind to (or do not significantly cross-react with) gliadin peptides unless they are presented by HLA-DQ2.5 complexes. All of the discussion elsewhere herein in relation to, for example, sequences and aspects and preferred embodiments, may be applied, mutatis mutandis, to this aspect of the invention.
  • An antigen binding protein according to any aspect of the present invention and disclosure may be defined as a binding protein comprising an antigen-binding domain obtained or derived from an antibody, or based on an antigen binding domain of an antibody.
  • light and heavy chain variable regions as described herein are those obtained or derived from an antibody, or based on an antigen binding domain of an antibody.
  • the antigen binding domain is not from a T-cell receptor (TCR).
  • TCR T-cell receptor
  • the protein having an antigen binding domain is an antibody or an antigen binding fragment thereof.
  • antibody and "immunoglobulin”, as used herein, refer broadly to any immunological binding agent that comprises an antigen binding domain (e.g. a human antigen binding domain), including polyclonal and monoclonal antibodies.
  • an antigen binding domain e.g. a human antigen binding domain
  • whole antibodies are assigned to one of five major classes: IgA, IgD, IgE, IgG, and IgM and the antibodies of the invention may be in any one of these classes.
  • subclasses or isotypes such as lgG1 , lgG2, lgG3, lgG4, and the like.
  • the heavy-chain constant domains that correspond to the difference classes of immunoglobulins are termed a, d, e, g and m, respectively.
  • immunoglobulins are well known.
  • IgG e.g. IgGi or lgG 2b such as human IgGi or mouse lgG 2b
  • IgM are preferred because they are the most common antibodies in the physiological situation and because they are most easily made in a laboratory setting.
  • the "light chains" of mammalian antibodies are assigned to one of two clearly distinct types: kappa (K) and lambda (l), based on the amino acid sequences of their constant domains and some amino acids in the framework regions of their variable domains. In some embodiments, kappa (K) light chains are preferred.
  • the immunological binding reagents encompassed by the term “antibody” includes or extends to all antibodies and antigen binding fragments thereof, including whole antibodies, dimeric, trimeric and multimeric antibodies; bispecific antibodies; chimeric antibodies; recombinant and engineered antibodies, and fragments thereof.
  • antibody is thus used to refer to any antibody-like molecule that has an antigen binding region, and this term includes antibody fragments that comprise an antigen binding domain such as Fab', Fab, F(ab') 2 , single domain antibodies (DABs), TandAbs dimer, Fv, scFv (single chain Fv), dsFv, ds-scFv, Fd, linear antibodies, minibodies, diabodies, bispecific antibody fragments, bibody, tribody (scFv-Fab fusions, bispecific or trispecific, respectively); sc-diabody;
  • kappa(lamda) bodies scFv-CL fusions
  • BiTE Bispecific T-cell Engager, scFv-scFv tandems to attract T cells
  • DVD-lg dual variable domain antibody, bispecific format
  • SIP small immunoprotein, a kind of minibody
  • SMIP small modular immunopharmaceutical
  • DART ds-stabilized diabody "Dual Affinity ReTargeting”
  • small antibody mimetics small antibody mimetics.
  • Antibodies of the present invention are typically and preferably human antibodies (e.g. fully human antibodies).
  • antibodies may also be of other types e.g. murine antibodies or humanized antibodies.
  • “Humanized” versions of antibodies are based on substantially non-human variable region domains, e.g. mouse variable region domains, and typically certain amino acids have been changed to better correspond with the amino acids typically present in human antibodies. Methods for generating humanized antibodies are well known in the art. For example, humanized antibodies can be accomplished by inserting the appropriate CDRs (e.g. murine CDRs) into a human antibody "scaffold".
  • CDRs e.g. murine CDRs
  • the antibodies of the invention are human antibodies, more preferably fully human antibodies.
  • human antibodies generally have at least two potential advantages for use in human therapy. First, the human immune system should not recognize the antibody as foreign. Second, the half-life in the human circulation will be similar to naturally occurring human antibodies, allowing smaller and less frequent doses to be given.
  • human as used herein in connection with antibody molecules and binding proteins first refers to antibodies and binding proteins having variable regions (e.g., V H , V L , CDR or FR regions) and, optionally, constant antibody regions, isolated or derived from a human repertoire or derived from or corresponding to sequences found in humans or a human repertoire, e.g., in the human germline or somatic cells.
  • variable regions e.g., V H , V L , CDR or FR regions
  • constant antibody regions isolated or derived from a human repertoire or derived from or corresponding to sequences found in humans or a human repertoire, e.g., in the human germline or somatic cells.
  • the "human” antibodies and binding proteins of the invention further include amino acid residues not encoded by human sequences, e.g., mutations introduced by random or site directed mutations in vitro, for example mutations introduced by in vitro cloning or PCR, for example in an affinity maturation method.
  • mutations are mutations that involve conservative substitutions or other mutations in a small number of residues of the antibody or binding protein, e.g., in up to 5, 4, 3, 2 or 1 of the residues of the antibody or binding protein, preferably e.g., in up to 5, 4, 3, 2 or 1 of the residues making up one or more of the CDRs of the antibody or binding protein.
  • Certain examples of such "human” antibodies include antibodies and variable regions that have been subjected to standard modification techniques to reduce the amount of potentially immunogenic sites.
  • the "human” antibodies of the invention include sequences derived from and related to sequences found in humans, but which may not naturally exist within the human antibody germline repertoire in vivo.
  • the human antibodies and binding proteins of the present invention include proteins comprising human consensus sequences identified from human sequences, or sequences substantially homologous to human sequences.
  • human antibodies and binding proteins of the present invention are not limited to combinations of V H , V L, CDR or FR regions that are themselves found in combination in human antibody molecules.
  • the human antibodies and binding proteins of the invention can include or correspond to combinations of such regions that do not necessarily exist naturally in humans (e.g. are not naturally occurring antibodies).
  • the human antibodies will be fully human antibodies.
  • “Fully human” antibodies are antibodies comprising "human” variable region domains and/or CDRs, as defined above, without substantial non-human antibody sequences or without any non-human antibody sequences.
  • antibodies comprising human variable region domains and/or CDRs "without substantial non-human antibody sequences” are antibodies, domains and/or CDRs in which only up to 5, 4, 3, 2 or 1 amino acids are amino acids that are not encoded by human antibody sequences.
  • “fully human” antibodies are distinguished from “humanized” antibodies, which are based on substantially non-human variable region domains, e.g., mouse variable region domains, in which certain amino acids have been changed to better correspond with the amino acids typically present in human antibodies.
  • the "fully human” antibodies of the invention may be human variable region domains and/or CDRs without any other substantial antibody sequences, such as being single chain antibodies.
  • the "fully human” antibodies of the invention may be human variable region domains and/or CDRs integral with or operatively attached to one or more human antibody constant regions.
  • Certain preferred fully human antibodies are IgG antibodies with the full complement of IgG constant regions.
  • "human” antibodies of the invention will be part- human chimeric antibodies.
  • Part-human chimeric” antibodies, as used herein, are antibodies comprising "human” variable region domains and/or CDRs operatively attached to, or grafted onto, a constant region of a non-human species, such as rat or mouse.
  • Such part-human chimeric antibodies may be used, for example, in pre- clinical studies, wherein the constant region will preferably be of the same species of animal used in the pre-clinical testing. These part-human chimeric antibodies may also be used, for example, in ex vivo diagnostics, wherein the constant region of the non-human species may provide additional options for antibody detection.
  • Antibodies of the present invention may also be CDR grafted antibodies.
  • Such antibodies are antibodies comprising the CDR sequences (e.g. 3 VH CDRs and/or 3 VL CDRs) of an antibody of the invention grafted into a framework region that is different from the framework region with which the CDRs are associated in the VL and/or VH domains described herein.
  • heavy chain complementarity determining region refers to regions of hypervariability within the heavy chain variable region (V H domain) of an antibody molecule.
  • the heavy chain variable region has three CDRs termed heavy chain CDR1 , heavy chain CDR2 and heavy chain CDR3 from the amino terminus to carboxy terminus.
  • the heavy chain variable region also has four framework regions (FR1 , FR2, FR3 and FR4 from the amino terminus to carboxy terminus). These framework regions separate the CDRs.
  • Preferred heavy chain variable region framework sequences are set forth in the sequence tables herein.
  • the invention provides antigen binding proteins (e.g. antibodies) which comprise a heavy chain variable region comprising three CDRs that are separated by (or flanked by) framework FR regions.
  • V H domain refers to the variable region of a heavy chain of an antibody molecule.
  • light chain complementarity determining region refers to regions of hypervariability within the light chain variable region (V L domain) of an antibody molecule.
  • Light chain variable regions have three CDRs termed light chain CDR1 , light chain CDR2 and light chain CDR3 from the amino terminus to the carboxy terminus.
  • the light chain variable region also has four framework regions (FR1 , FR2, FR3 and FR4 from the amino terminus to carboxy terminus). These framework regions separate the CDRs.
  • Preferred light chain variable region framework sequences are set forth in the sequence tables herein.
  • the invention provides antigen binding proteins (e.g. antibodies) which comprise a light chain variable region comprising three CDRs that are separated by (or flanked by) framework FR regions.
  • V L domain light chain variable region
  • Antibodies can be fragmented using conventional techniques. For example, F(ab') 2 fragments can be generated by treating the antibody with pepsin. The resulting F(ab') 2 fragment can be treated to reduce disulfide bridges to produce Fab' fragments. Papain digestion can lead to the formation of Fab fragments. Fab, Fab' and F(ab') 2 , scFv, Fv, dsFv, Fd, dAbs, TandAbs, ds-scFv, dimers, minibodies, diabodies, bispecific antibody fragments and other fragments can also be synthesized by recombinant techniques or can be chemically synthesized.
  • the antibody or antibody fragment of the present invention comprises all or a portion of a heavy chain constant region, such as an lgG1 , lgG2, lgG3, lgG4, lgA1 , lgA2, IgE, IgM or IgD constant region.
  • the heavy chain constant region is an IgG heavy chain constant region, e.g. an IgGi or an lgG 2b heavy chain constant region, or a portion thereof.
  • the antibody or antibody fragment can comprise all or a portion of a kappa light chain constant region or a lambda light chain constant region, or a portion thereof. All or part of such constant regions may be produced naturally or may be wholly or partially synthetic.
  • IgGi antibodies are preferred (e.g. human IgG-i . antibodies).
  • lgG 2b antibodies are preferred (e.g. mouse lgG 2b antibodies).
  • the antibodies or antibody fragments can be produced naturally or can be wholly or partially synthetically produced.
  • the antibody may be from any appropriate source, for example recombinant sources and/or produced in transgenic animals or transgenic plants, or in eggs using the IgY technology.
  • the antibody molecules can be produced in vitro or in vivo.
  • the antibody or antibody fragment comprises an antibody light chain variable region (V L ) that comprises three CDR domains and an antibody heavy chain variable region (V H ) that comprises three CDR domains.
  • V L antibody light chain variable region
  • V H antibody heavy chain variable region
  • Said VL and VH generally form the antigen binding site.
  • Fv fragment is the minimum antibody fragment that contains a complete antigen-recognition and binding site. This region has a dimer of one heavy chain and one light chain variable domain in tight, non-covalent association. It is in this configuration that the three hypervariable regions (CDRs) of each variable domain interact to define an antigen-binding site on the surface of the V H -V L dimer.
  • CDRs hypervariable regions
  • camelid antibodies have an extensive antigen binding repertoire but are devoid of light chains.
  • results with single domain antibodies comprising VH domains alone or VL domains alone show that these domains can bind to antigen with acceptably high affinities.
  • three CDRs can effectively bind antigen.
  • fragment refers to fragments of biological relevance, e.g. fragments that contribute to antigen binding, e.g. form part of the antigen binding site, and/or contribute to the functional properties of the antibodies of the invention.
  • Certain preferred fragments comprise a heavy chain variable region (V H domain) and a light chain variable region (V L domain) of the antibodies of the invention.
  • antibodies of the invention comprise six CDR regions (three from a light chain and three from a heavy chain), antibodies can have fewer than six CDR regions (e.g. 3 CDR regions). Antibodies can have CDRs from only the heavy chain or light chain.
  • Preferred light chain CDR regions for use in conjunction with the specified heavy chain CDR regions are described elsewhere herein. However, other light chain variable regions that comprise three CDRs for use in conjunction with the heavy chain variable regions of the invention are also contemplated. Appropriate light chain variable regions which can be used in combination with the heavy chain variable regions of the invention and which give rise to an antibody which binds HLA-DQ2.5:DQ2.5-gliadin peptides in accordance with the invention can be readily identified by a person skilled in the art.
  • a heavy chain variable region of the invention can be combined with a single light chain variable region or a repertoire of light chain variable regions and the resulting antibodies tested for binding to HLA- DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2.
  • a yet further aspect of the invention provides an antibody, preferably an isolated antibody, more preferably a human (or fully human) antibody, which binds to or specifically recognizes HLA-DQ2.5:DQ2.5-glia-a1a or HLA-DQ2.5:DQ2.5-glia- a2 and which has the ability to compete with (i.e. bind to the same or substantially the same epitope as) one or more of the specific antibodies of the invention described herein, or the ability to compete with an antibody comprising the same CDRs as one or more of the specific antibodies described herein for binding to HLA- DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2.
  • Other features and properties of other aspects of the invention apply, mutatis mutandis, to this aspect of the invention.
  • binding assays can be used to identify other antibodies and antibody fragments with the same binding specificities as the antibodies and antibody fragments of the invention.
  • the above described abilities and properties are observed at a measurable or significant level and more preferably at a statistically significant level, when compared to appropriate control levels. More preferably, one or more of the above described abilities and properties are observed at a level which is
  • R2A1-8E, R3A2-9F, R4A1-3A also referred to as 107
  • 206 217, 218, 220, 221 , 223, 226 or 228 antibodies.
  • the statistically significant difference over a relevant control or other comparative entity or measurement has a probability value of ⁇ 0.1 , preferably ⁇ 0.05.
  • Appropriate methods of determining statistical significance are well known and documented in the art and any of these may be used.
  • second generation antigen binding proteins e.g. antibodies
  • Second generation antibodies that have an enhanced biological property or activity of at least about 2- fold, 5-fold, 10-fold, 20-fold, and preferably, at least about 50-fold, in comparison to the specific HLA-DQ2.5:DQ2.5-glia-a1a or HLA-DQ2.5:DQ2.5-glia-a2 antigen binding proteins (e.g. antibodies) of the present invention, are encompassed by the present invention.
  • conjugates e.g. targeting conjugates
  • the VL CDRs and VH CDRs may be on the same chain (same polypeptide) or be on separate chains (separate polypeptides).
  • conjugates and molecules the VL domain and VH domain may be on the same chain (same polypeptide) or may be on separate chains (separate polypeptides).
  • the separate chains may be linked by any convenient means and the skilled person is familiar with different possibilities for such linking (e.g. covalent linkages e.g. via the introduction of cysteine residues into a constant region to enable disulphide bonding, i.e. linkage via a disulphide bond).
  • the invention provides CARs (chimeric antigen receptors) or CAR (chimeric antigen receptor) T cells.
  • the invention provides CARs or CAR T cells comprising (or based on) an antibody of the invention.
  • a protein comprising an antigen binding domain of the present invention may be coupled to (e.g. fused with) transmembrane domain or a intracellular domain of a CAR.
  • a CAR is a chimeric antigen receptor.
  • a CAR commonly comprises a single-chain Fv domain (scFv) derived from an antibody fused to a signalling tail which, upon antigen binding, transduces a signal across a cell membrane to activate the effector functions of an immune effector cell, e.g. a T-cell or an NK cell.
  • CARs may be used to redirect immune effector cells to a target of interest in immunotherapy. CARs, and their therapeutic uses, are described in Maude et al. (Blood, Volume 125(26), 4017-4023, 2015). CAR immunotherapy has proven successful in a number of trials, but is limited by the breadth of available targets.
  • transmembrane domains are discussed in WO 2017/1 18745 (which is incorporated herein by reference), including suitable transmembrane domains and intracellular signalling domains which may be included in CARs.
  • the transmembrane domain may be based on or derived from the transmembrane domain of any transmembrane protein. Typically it may be, or may be derived from, a transmembrane domain from CD8a, CD28, CD4, O ⁇ 3z, CD45, CD9, CD16, CD22, CD33, CD64, CD80, CD86, CD134, CD137, or CD154, preferably from a human said protein.
  • CD8a, CD28, CD4, O ⁇ 3z, CD45, CD9, CD16, CD22, CD33, CD64, CD80, CD86, CD134, CD137, or CD154 preferably from a human said protein.
  • the transmembrane domain may be, or may be derived from, a transmembrane domain from CD8a, CD28, CD4, or O ⁇ 3z, preferably from human CD28, CD4, or CD3z.
  • the transmembrane domain may be synthetic in which case it would comprise predominantly hydrophobic residues such as leucine and valine.
  • the transmembrane domain may be the transmembrane domain of the human TCR a-chain constant region or a human TCR b-chain constant region.
  • intracellular signalling domain refers herein to the part of the CAR signalling tail that participates in transducing the message of effective CAR binding to a target antigen-MHC complex into the interior of an immune effector cell expressing the CAR, to elicit effector cell function, e.g. activation, cytokine production, proliferation and/or cytotoxic activity, including the release of cytotoxic factors to the CAR-bound target cell, or other cellular responses elicited with antigen binding to the extracellular CAR domain.
  • effector function refers to a specialised function of the cell. Effector function of a T-cell, for example, may be cytolytic activity or helper activity including the secretion of a cytokine.
  • intracellular signalling domain refers to a protein domain which transduces the effector function signal and directs the cell to perform a specialised function. While an entire natural intracellular signalling domain can be employed, in many cases it is not necessary to use an entire domain as found in nature. To the extent that a truncated portion of an intracellular signalling domain is used, such a truncated portion may be used in place of the entire domain as long as it transduces the effector function signal.
  • intracellular signalling domain is meant to include any truncated portion of an intracellular signalling domain sufficient to transduce effector function signal.
  • the intracellular signalling domain is also known as the, "signal transduction domain,” and is typically derived from portions of the human O ⁇ 3z or FcRy chains.
  • the CAR may be provided with a secondary, or co-stimulatory domain.
  • the intracellular signalling domain may initiate antigen-dependent primary activation (i.e. may be a primary cytoplasmic signalling sequence) and the co-stimulatory domain may act in an antigen-independent manner to provide a secondary or co-stimulatory signal (secondary cytoplasmic signalling sequence(s)).
  • Primary cytoplasmic signalling sequences may regulate primary activation, including in an inhibitory way.
  • Primary cytoplasmic signalling sequences that act in a co-stimulatory manner may contain signalling motifs which are known as immunoreceptor tyrosine-based activation motifs or ITAMs.
  • co-stimulatory signalling domain refers to the portion of the CAR comprising the intracellular domain of a co- stimulatory molecule.
  • Co-stimulatory molecules are cell surface molecules other than antigen receptors or Fc receptors that provide a second signal required for efficient activation and function of an immune effector cell (e.g. a T-cell) upon binding to antigen. Examples of such co-stimulatory molecules include CD27,
  • CD28 4- IBB (CD137), 0X40 (CD134), CD30, CD40, PD-1 , ICOS (CD278), LFA-1 , CD2, CD7, LIGHT, NKD2C, B7-H2 and a ligand that specifically binds CD83, more particularly the intracellular domains of such molecules.
  • the molecules are human.
  • co-stimulatory domains are derived from 4-1 BB, CD28 or 0X40 (CD134), other co-stimulatory domains are contemplated for use with the CARs described herein.
  • the co-stimulatory domains may be used singly or in combination (i.e. one or more co-stimulatory domains may be included).
  • the inclusion of one or more co-stimulatory signalling domains may enhance the efficacy and expansion of immune effector cells expressing the CARs.
  • an antigen binding protein of the present invention comprises two variable domains, i.e. a variable domain comprising three VH CDRs and a variable domain comprising three VL CDRs, each fused to a constant region (typically to the N-terminus of the constant region), wherein the two constant regions are linked (e.g. via a covalent linkage, such a disulphide bond), and optionally a targeting moiety is attached to one (or both) of the constant regions (e.g. at the C- terminus of the constant domain).
  • an antigen binding protein of the present invention comprises two variable domains, i.e. a variable domain comprising three VH CDRs and a variable domain comprising three VL CDRs (typically fused together), one constant region that is fused to (typically the C-terminus of) one of the variable domains (e.g. a heavy chain or a light chain constant region), one transmembrane domain and one intracellular signalling domain (typically the transmembrane domain being fused to (e.g. the C-terminus of ) the constant domain and the intracellular signalling domain being fused to (e.g. the C-terminus of) the transmembrane domain).
  • an antigen binding protein of the present invention comprises two variable domains, i.e. a variable domain comprising three VH CDRs and a variable domain comprising three VL CDRs, each fused to a constant region (typically to the N-terminus of the constant region), wherein the two constant regions are linked (e.g. via a covalent linkage, such as a disulphide bond), and one of the constant regions has fused thereto (typically at the C-terminus of said constant region) a transmembrane domain and the transmembrane domain has fused thereto (typically at the C-terminus of said transmembrane domain) an intracellular signalling domain.
  • an antigen binding protein of the present invention comprises two variable domains, i.e. a variable domain comprising three VH CDRs and a variable domain comprising three VL CDRs, each fused to a constant region (typically to the N-terminus of the constant region), wherein the two constant regions are linked (e.g. via a covalent linkage, such a disulphide bond), and one (or both) of the constant regions is linked (or connected) to a lipid (e.g. a membrane anchoring lipid) which can target micelles (e.g. micelles comprising or containing a drug).
  • the lipid is connected to (or linked to or attached to) the C-terminus of the constant region.
  • an antigen binding protein of the present invention comprises two Fv domains, which may be fused together (e.g. at their respective C- terminuses) and each Fv domain may have a linkage (e.g. a covalent linkage, such as a disulphide bond) linking the two chains of the Fv domain.
  • a linkage e.g. a covalent linkage, such as a disulphide bond
  • the present invention provides a bispecific antigen binding protein (e.g. an antibody or antigen binding fragment thereof), wherein said bispecific antigen binding protein comprises at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a as defined elsewhere herein and at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 as defined elsewhere herein.
  • a bispecific antigen binding protein e.g. an antibody or antigen binding fragment thereof
  • said bispecific antigen binding protein comprises at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a as defined elsewhere herein and at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to,
  • the antigen binding protein of the invention is a BiTe molecule (Bispecific T-cell engager).
  • the BiTe format (BiTe molecule) is known to a person skilled in the art.
  • two scFv molecules, targeting (or binding) different antigens are operatively coupled (attached) through a linker (typically a genetically encoded synthetic linker) which brings (or places) both scFvs (or scFv units) into a single open reading frame (ORF).
  • a linker typically a genetically encoded synthetic linker
  • one scFv (or scFv unit) of a BiTe binds (or targets) HLA-DQ2.5:DQ2.5-glia-a1a or HLA-DQ2.5:DQ2.5-glia- a2 in accordance with the present invention and the other scFv (or scFv unit) targets CD3.
  • the present invention provides a bispecific antigen binding protein (e.g. an antibody or antigen binding fragment thereof), wherein said bispecific antigen binding protein comprises at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a as defined elsewhere herein or at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a2 as defined elsewhere herein, and at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to CD3.
  • a bispecific antigen binding protein e.g. an antibody or antigen binding fragment thereof
  • said bispecific antigen binding protein comprises at least one heavy chain variable region and at least one light chain variable region of an antibody that binds to, or specifically binds to, HLA-DQ2.5:DQ2.5-glia-a1a as defined elsewhere here
  • the antibody, binding protein and nucleic acid molecules of the invention are generally "isolated” or “purified” molecules insofar as they are distinguished from any such components that may be present in situ within a human or animal body or a tissue sample derived from a human or animal body.
  • the sequences may, however, correspond to or be substantially homologous to sequences as found in a human or animal body.
  • the term "isolated” or “purified” as used herein in reference to nucleic acid molecules or sequences and proteins or polypeptides, e.g. antibodies refers to such molecules when isolated from, purified from, or substantially free of their natural environment, e.g. isolated from or purified from the human or animal body (if indeed they occur naturally), or refers to such molecules when produced by a technical process, i.e. includes recombinant and synthetically produced molecules.
  • isolated or purified typically refers to a protein substantially free of cellular material or other proteins from the source from which it is derived.
  • isolated or purified proteins are substantially free of culture medium when produced by recombinant techniques, or chemical precursors or other chemicals when chemically
  • Nucleic acid molecules comprising nucleotide sequences that encode the antigen binding proteins (e.g. antibodies) of the present invention as defined herein or parts or fragments thereof, or nucleic acid molecules substantially homologous thereto, form yet further aspects of the invention.
  • Preferred nucleic acid molecules are those encoding a VH region of an antibody of the present invention.
  • Other preferred nucleic acid molecules are those encoding a VL region of an antibody of the present invention.
  • Other preferred nucleic acid molecules are those encoding a VH region of an antibody of the present invention and a VL region of an antibody of the present invention.
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:4 (such as SEQ ID NO:2) and/or a VH region of SEQ ID NO:3 (such as SEQ ID NO:1 ).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:22 (such as SEQ ID NO:20) and/or a VH region of SEQ ID NO:21 (such as SEQ ID NO:19).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:40 (such as SEQ ID NO:38) and/or a VH region of SEQ ID NO:39 (such as SEQ ID NO:37).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:58 (such as SEQ ID NO:56) and/or a VH region of SEQ ID NO:57 (such as SEQ ID NO:55).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:76 (such as SEQ ID NO:74) and/or a VH region of SEQ ID NO:75 (such as SEQ ID NO:73).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:94 (such as SEQ ID NO:92) and/or a VH region of SEQ ID NO:93 (such as SEQ ID NO:91 ).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:112 (such as SEQ ID NO:110) and/or a VH region of SEQ ID NO:1 11 (such as SEQ ID NQ:109). In some embodiments, preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:130 (such as SEQ ID NO:128) and/or a VH region of SEQ ID NO:129 (such as SEQ ID NO:127).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:148 (such as SEQ ID NO:146) and/or a VH region of SEQ ID NO:147 (such as SEQ ID NO:145).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:166 (such as SEQ ID NO:164) and/or a VH region of SEQ ID NO:165 (such as SEQ ID NO:163).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:184 (such as SEQ ID NO:182) and/or a VH region of SEQ ID NO:183 (such as SEQ ID NO:181 ).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:202 (such as SEQ ID NO:200) and/or a VH region of SEQ ID NO:201 (such as SEQ ID NO:199).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:220 (such as SEQ ID NO:218) and/or a VH region of SEQ ID NO:219 (such as SEQ ID NO:217).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:238 (such as SEQ ID NO:236) and/or a VH region of SEQ ID NO:237 (such as SEQ ID NO:235).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:256 (such as SEQ ID NO:254) and/or a VH region of SEQ ID NO:255 (such as SEQ ID NO:253).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:274 (such as SEQ ID NO:272) and/or a VH region of SEQ ID NO:273 (such as SEQ ID NO:271 ).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:292 (such as SEQ ID NO:290) and/or a VH region of SEQ ID NO:291 (such as SEQ ID NO:289).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:310 (such as SEQ ID NO:308) and/or a VH region of SEQ ID NO:309 (such as SEQ ID NO:307).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:328 (such as SEQ ID NO:326) and/or a VH region of SEQ ID NO:327 (such as SEQ ID NO:325). In some embodiments, preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:346 (such as SEQ ID NO:344) and/or a VH region of SEQ ID NO:345 (such as SEQ ID NO:343).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:364 (such as SEQ ID NO:362) and/or a VH region of SEQ ID NO:363 (such as SEQ ID NO:361 ).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:382 (such as SEQ ID NO:380) and/or a VH region of SEQ ID NO:381 (such as SEQ ID NO:379).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:400 (such as SEQ ID NO:398) and/or a VH region of SEQ ID NO:399 (such as SEQ ID NO:397).
  • preferred nucleic acid molecules are those encoding a VL region of SEQ ID NO:499 (such as SEQ ID NO:497) and/or a VH region of SEQ ID NO:498 (such as SEQ ID NO:496).
  • nucleic acid molecules are those encoding the IgG heavy and/or light chain sequences defined herein, or sequences substantially homologous thereto.
  • nucleic acid molecules are those having a nucleic acid sequence that is substantially homologous to the specific nucleic acid sequences defined herein, for example having at least 80% sequence identity to specific nucleic acid sequences defined herein.
  • nucleic acid sequence or “nucleic acid molecule” as used herein refers to a sequence of nucleoside or nucleotide monomers composed of naturally occurring bases, sugars and intersugar (backbone) linkages. The term also includes modified or substituted sequences comprising non-naturally occurring monomers or portions thereof.
  • the nucleic acid sequences of the present invention may be deoxyribonucleic acid sequences (DNA) or ribonucleic acid sequences (RNA) and may include naturally occurring bases including adenine, guanine, cytosine, thymidine and uracil. The sequences may also contain modified bases.
  • modified bases include aza and deaza adenine, guanine, cytosine, thymidine and uracil; and xanthine and hypoxanthine.
  • the nucleic acid molecules may be double stranded or single stranded.
  • the nucleic acid molecules may be wholly or partially synthetic or recombinant.
  • proteins and polypeptides of the invention may be prepared in any of several ways well known and described in the art, but are most preferably prepared using recombinant methods.
  • Nucleic acid fragments encoding the light and heavy chain variable regions of the antibodies of the invention can be derived or produced by any appropriate method, e.g. by cloning or synthesis.
  • nucleic acid fragments encoding the light and heavy chain variable regions of the antibodies of the invention can be further manipulated by standard recombinant DNA techniques, for example to convert the variable region fragments into full length antibody molecules with appropriate constant region domains, or into particular formats of antibody fragment discussed elsewhere herein, e.g. Fab fragments, scFv fragments, etc.
  • the nucleic acid fragments encoding the antibody molecules of the invention are generally incorporated into one or more appropriate expression vectors in order to facilitate production of the antibodies of the invention.
  • Possible expression vectors include but are not limited to cosmids, plasmids, or modified viruses (e.g. replication defective retroviruses, adenoviruses and adeno- associated viruses), so long as the vector is compatible with the host cell used.
  • the expression vectors are "suitable for transformation of a host cell", which means that the expression vectors contain a nucleic acid molecule of the invention and regulatory sequences selected on the basis of the host cells to be used for expression, which are operatively linked to the nucleic acid molecule. Operatively linked is intended to mean that the nucleic acid is linked to regulatory sequences in a manner that allows expression of the nucleic acid.
  • the invention therefore contemplates a recombinant expression vector containing a nucleic acid molecule of the invention, or a fragment thereof, and the necessary regulatory sequences for the transcription and translation of the protein sequence encoded by the nucleic acid molecule of the invention.
  • Suitable regulatory sequences may be derived from a variety of sources, including bacterial, fungal, viral, mammalian, or insect genes and are well known in the art. Selection of appropriate regulatory sequences is dependent on the host cell chosen as discussed below, and may be readily accomplished by one of ordinary skill in the art. Examples of such regulatory sequences include: a transcriptional promoter and enhancer or RNA polymerase binding sequence, a ribosomal binding sequence, including a translation initiation signal. Additionally, depending on the host cell chosen and the vector employed, other sequences, such as an origin of replication, additional DNA restriction sites, enhancers, and sequences conferring inducibility of transcription may be incorporated into the expression vector.
  • the recombinant expression vectors of the invention may also contain a selectable marker gene that facilitates the selection of host cells transformed or transfected with a recombinant molecule of the invention.
  • the recombinant expression vectors may also contain genes that encode a fusion moiety that provides increased expression of the recombinant protein;
  • Recombinant expression vectors can be introduced into host cells to produce a transformed host cell.
  • the terms "transformed with”, “transfected with”, “transformation” and “transfection” are intended to encompass introduction of nucleic acid (e.g., a vector) into a cell by one of many possible techniques known in the art. Suitable methods for transforming and transfecting host cells can be found in Sambrook et al., 1989 (Sambrook, Fritsch and Maniatis, Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Harbor Press, Cold Spring Harbor, NY, 1989) and other laboratory textbooks.
  • Suitable host cells include a wide variety of eukaryotic host cells and prokaryotic cells.
  • the proteins of the invention may be expressed in yeast cells or mammalian cells.
  • the proteins of the invention may be expressed in prokaryotic cells, such as Escherichia coli.
  • promoters, terminators, and methods for introducing expression vectors of an appropriate type into plant, avian, and insect cells may also be readily accomplished.
  • proteins of the invention may also be expressed in non- human transgenic animals such as, rats, rabbits, sheep and pigs.
  • the proteins of the invention may also be prepared by chemical synthesis using techniques well known in the chemistry of proteins such as solid phase synthesis.
  • N-terminal or C-terminal fusion proteins comprising the antibodies and proteins of the invention conjugated to other molecules, such as proteins, may be prepared by fusing through recombinant techniques.
  • the resultant fusion proteins contain an antibody or protein of the invention fused to the selected protein or marker protein, or tag protein as described herein.
  • the antibodies and proteins of the invention may also be conjugated to other proteins by known techniques.
  • the proteins may be coupled using heterobifunctional thiol-containing linkers as described in WO 90/10457, N-succinimidyl-3-(2-pyridyldithio-proprionate) or N-succinimidyl-5 thioacetate.
  • a yet further aspect provides an expression construct or expression vector comprising one or more of the nucleic acid fragments or segments or molecules of the invention.
  • the expression constructs or vectors are recombinant.
  • said constructs or vectors further comprise the necessary regulatory sequences for the transcription and translation of the protein sequence encoded by the nucleic acid molecule of the invention.
  • a yet further aspect provides a host cell or virus comprising one or more expression constructs or expression vectors of the invention. Also provided are host cells or viruses comprising one or more of the nucleic acid molecules of the invention.
  • a host cell e.g. a mammalian host cell
  • virus expressing an antibody of the invention forms a yet further aspect.
  • a yet further aspect of the invention provides a method of producing (or manufacturing) a protein (e.g. antibody) of the present invention comprising a step of culturing the host cells of the invention.
  • Preferred methods comprise the steps of (i) culturing a host cell comprising one or more of the recombinant expression vectors or one or more of the nucleic acid sequences of the invention under conditions suitable for the expression of the encoded antibody or protein; and optionally (ii) isolating or obtaining the antibody or protein from the host cell or from the growth medium/supernatant.
  • Such methods of production (or manufacture) may also comprise a step of purification of the antibody or protein product and/or formulating the antibody or product into a composition including at least one additional component, such as a pharmaceutically acceptable carrier or excipient.
  • the protein (e.g. antibody) of the invention is made up of more than one polypeptide chain (e.g. certain fragments such as Fab fragments or whole antibodies), then all the polypeptides are preferably expressed in the host cell, either from the same or a different expression vector, so that the complete proteins, e.g. antibody proteins of the invention, can assemble in the host cell and be isolated or purified therefrom.
  • polypeptide chain e.g. certain fragments such as Fab fragments or whole antibodies
  • the invention provides a method of binding HLA- DQ2.5:DQ2.5-glia-a1a or HLA-DQ2.5:DQ2.5-glia-a2, comprising contacting a composition comprising HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 with an antigen binding protein of the invention, or an immunoconjugate thereof.
  • the invention provides a method of detecting HLA- DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2, comprising contacting a composition suspected of containing HLA-DQ2.5:DQ2.5-glia-a1 a or HLA- DQ2.5:DQ2.5-glia-a2 with an antigen binding protein of the invention, or an immunoconjugate thereof, under conditions effective to allow the formation of HLA- DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2/antibody complexes and detecting the complexes so formed.
  • the invention provides a method of detecting HLA-DQ2.5:DQ2.5 presenting a celiac disease associated peptide, or another gliadin peptide or gliadin-derived peptide, or variant of a gliadin derived peptide, or another gluten-derived peptide, comprising contacting a composition suspected of containing such a pMHC with an antigen binding protein of the invention, or an immunoconjugate thereof, under conditions effective to allow the formation of pMHC /antibody complexes and detecting the complexes so formed.
  • the antibodies of the invention may also be used to produce further antigen binding proteins, e.g. antibodies, that bind to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA- DQ2.5:DQ2.5-glia-a2.
  • Such uses involve for example the addition, deletion, substitution or insertion of one or more amino acids in the amino acid sequence of a parent antibody to form a new antibody, wherein said parent antibody is one of the antibodies of the invention as defined elsewhere herein, and testing the resulting new antibody to identify antibodies that bind to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA- DQ2.5:DQ2.5-glia-a2 in accordance with the invention.
  • Such methods can be used to form multiple new antibodies that can all be tested for their ability to bind HLA- DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2.
  • addition, deletion, substitution or insertion of one or more amino acids takes place in one or more of the CDR domains.
  • Such modification or mutation to a parent antibody can be carried out in any appropriate manner using techniques well known and documented in the art, for example by carrying out methods of random or directed mutagenesis.
  • directed mutagenesis If directed mutagenesis is to be used then one strategy to identify appropriate residues for mutagenesis utilizes the resolution of the crystal structure of the binding protein- antigen complex, e.g., the Ab-Ag complex, or homology/docking modelling of the binding protein-antigen complex to identify the key residues involved in the antigen binding.
  • Alanine scanning mutagenesis is also a routine method which can be used to identify the key residues involved in the antigen binding. Subsequently, those residues can be mutated to enhance the interaction.
  • one or more amino acid residues can simply be targeted for directed mutagenesis and the effect on binding to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 assessed.
  • Random mutagenesis can be carried out in any appropriate way, e.g., by error-prone PCR, chain shuffling or mutator E. coli strains.
  • one or more of the V H domains of the invention can be combined with a single V L domain or a repertoire of V L domains from any appropriate source and the resulting new antigen binding proteins (e.g. antibodies) tested to identify antibodies which bind to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2.
  • one or more of the V L domains of the invention can be combined with a single V H domain or repertoire of V H domains from any appropriate source and the resulting new antigen binding proteins (e.g. antibodies) tested to identify antibodies that bind to HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2.
  • one or more, or preferably all three CDRs of the V H and/or V L domains of the invention can be grafted into a single V H and/or V L domain or a repertoire of V H and/or V L domains, as appropriate, and the resulting new antigen binding proteins (e.g. antibodies) tested to identify antibodies that bind to HLA- DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2.
  • the resulting new antigen binding proteins e.g. antibodies
  • the new antibodies produced by these methods will preferably have improved functional properties, e.g. a higher or enhanced affinity (or at least an equivalent affinity) for HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 as the parent antibodies, and can be treated and used in the same way as the antibodies of the invention as described elsewhere herein (e.g., for therapy, diagnosis, in compositions etc.). Alternatively, or additionally, the new antibodies will have one or more other improved functional properties as described elsewhere herein.
  • New antibodies produced, obtained or obtainable by these methods form a yet further aspect of the invention.
  • HLA-DQ2.5:DQ2.5-glia-a1 a or HLA-DQ2.5:DQ2.5-glia-a2 can be carried out by any appropriate method, which are well known and described in the art.
  • the invention also provides a range of conjugated antigen binding proteins (e.g. antibodies) and fragments thereof in which the antigen binding protein is operatively attached to at least one other therapeutic or diagnostic agent.
  • conjugated antigen binding proteins e.g. antibodies
  • fragments thereof in which the antigen binding protein is operatively attached to at least one other therapeutic or diagnostic agent.
  • the term "immunoconjugate” is broadly used to define the operative association of the antigen binding protein (e.g. antibody) with another effective agent (e.g. therapeutic agent) and is not intended to refer solely to any type of operative association, and is particularly not limited to chemical "conjugation". Recombinant fusion proteins are particularly contemplated. So long as the delivery or targeting agent is able to bind to the target and the therapeutic or diagnostic agent is sufficiently functional upon delivery, the mode of attachment will be suitable.
  • the therapeutic agent may be a drug molecule, e.g. a toxin to kill a target cell.
  • a suitable toxin is a toxin which, alone, is unable to enter, kill or otherwise disrupt a human cell but, when taken up by a human cell via the immunoconjugate, is able to exert its toxic effects. Such a toxin will thus only be taken up by, and exert its target effects on, a cell bound by the immunoconjugate, into which the
  • the toxin may be any known appropriate cytotoxic species, i.e. it may be any suitable cytotoxin.
  • cytotoxin as used herein is meant any toxin which inhibits the growth and/or viability of a cell. Growth includes the division of a target cell (i.e. a cell into which it enters).
  • the toxin may thus be any toxin which reduces or has a negative impact on the viability or survival of a cell and in particular includes any toxin which induces death of a target cell, e.g. the toxin may induce apoptosis or necrosis of a target cell.
  • Such a toxin may be a peptide toxin lacking a targeting domain.
  • it may be a peptide toxin which natively lacks a targeting domain, or it may be a peptide toxin modified relative to its native form to remove its targeting domain.
  • examples of such toxins include saporin and gelonin, which are ribosome- inactivating proteins (RIPs) of the same family as e.g. ricin, but which are unable to cross the plasma membrane of a cell.
  • the enzymatic domains i.e.
  • a cytotoxin of a pathogen may be used, such as the enzymatic domain of a bacterial cytotoxin, e.g. the enzymatic domain of diphtheria toxin, Pseudomonas exotoxin A or a Clostridial cytotoxin, e.g. TcsL of Clostridium sordellii.
  • the immunoconjugate may be encoded as a fusion protein, with the toxin linked for example to a single chain antigen binding protein construct, or to one of the chains of antigen binding protein with 2 or more chains, at the N or C terminus.
  • the toxin may be conjugated to the antigen binding protein using any suitable method known in the art.
  • the antigen binding protein may be biotinylated and conjugated to streptavidin-conjugated toxin (or vice versa). Other suitable methods are known to those skilled in the art.
  • the therapeutic agent may be any other useful therapeutic agent, for instance any other agent capable of killing or abrogating a cell, e.g. a radioisotope.
  • a diagnostic agent is an agent useful for diagnostic purposes.
  • Such an agent may in particular be a tracer or a label, i.e. an agent which can be detected in order to follow its passage through a human body.
  • a tracer or label may in particular be detected by a scan, e.g. a PET scan or a CT scan.
  • Many tracers and labels are known in the art, including radiolabels.
  • Any suitable tracer or label may be used according to the present disclosure, including the common radioisotopes 11 C, 13 N, 15 0, 18 F, 99 TC and 123 l and 125 l.
  • a diagnostic agent may be conjugated to an antigen binding protein using any suitable labelling group, such as are known in the art.
  • the antigen binding protein may be radiolabelled using radiolabelled biotin.
  • the antigen binding protein may be conjugated to a carrier comprising or containing a therapeutic or diagnostic agent.
  • a carrier comprising or containing a therapeutic or diagnostic agent.
  • Pharmaceutical carriers are known in the art. Examples of suitable carriers include in particular micelles and liposomes.
  • a micelle is an aggregate of surfactants (e.g. fatty acids) in an aqueous liquid, in which the hydrophilic head groups of the surfactants form the surface of the aggregate and the hydrophobic tail groups the core.
  • a liposome is a spherical vesicle formed from a lipid bilayer surrounding an aqueous core. The therapeutic or diagnostic agent may be located within the core of a micelle or liposome.
  • Liposomes and micelles may be synthesised using any method known in the art. Suitable methods for liposome synthesis and drug loading are described in e.g. Akbarzadeh et al., Nanoscale Res Lett 8(1 ): 102, 2013. Liposomes and micelles may be conjugated to antigen binding proteins using methods known in the art, e.g. the methods taught in Reulen et al., Bioconjug Chem 18(2): 590-596, 2007; or Kung & Redemann, Biochim Biophys Acta 862(2): 435-439, 1986.
  • An immunoconjugate comprising a therapeutic agent, or a carrier comprising a therapeutic agent may be used in therapy.
  • An immunoconjugate comprising a diagnostic agent, or a carrier comprising a diagnostic agent may be used in in vivo diagnostic methods.
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins of the invention are used (e.g. used therapeutically) in their "naked" unconjugated form.
  • compositions comprising at least a first antigen binding protein (e.g.
  • compositions comprising one or more antigen binding protein (e.g. antibody) of the invention in admixture with a suitable diluent, carrier or excipient constitute a preferred embodiment of the present invention.
  • a suitable diluent, carrier or excipient constitute a preferred embodiment of the present invention.
  • Such formulations may be for pharmaceutical use and thus compositions of the invention are preferably pharmaceutically acceptable.
  • Suitable diluents, excipients and carriers are known to the skilled man.
  • compositions according to the invention may be presented, for example, in a form suitable for oral, nasal, parenteral, intravenal, topical or rectal
  • compositions according to the invention are presented in a form suitable for intravenal administration.
  • compositions according to the invention are presented in a form suitable for intraperitoneal (i.p.) administration.
  • i.p. intraperitoneal
  • compositions according to the invention are presented in a form suitable for injection.
  • the active compounds defined herein may be presented in the conventional pharmacological forms of administration, such as tablets, coated tablets, nasal sprays, solutions, emulsions, liposomes, powders, capsules or sustained release forms. Conventional pharmaceutical excipients as well as the usual methods of production may be employed for the preparation of these forms.
  • Injection solutions may, for example, be produced in the conventional manner, such as by the addition of preservation agents, such as
  • the solutions may then be filled into injection vials or ampoules.
  • Nasal sprays may be formulated similarly in aqueous solution and packed into spray containers, either with an aerosol propellant or provided with means for manual compression.
  • compositions (formulations) of the present invention are preferably administered parenterally.
  • Intravenous administration is preferred.
  • administration is intraperitoneal (i.p.) administration.
  • Parenteral administration may be performed by subcutaneous, intramuscular or intravenous injection by means of a syringe. Alternatively, parenteral administration can be performed by means of an infusion pump.
  • a further option is a composition which may be a powder or a liquid for the administration of the antigen binding protein (e.g. antibody) in the form of a nasal or pulmonal spray.
  • the antigen binding proteins of the invention can also be administered transdermally, e.g. from a patch, optionally an iontophoretic patch, or
  • transmucosally e.g. bucally.
  • Suitable dosage units can be determined by a person skilled in the art.
  • compositions may additionally comprise further active ingredients (e.g. as described elsewhere herein) in the context of co-administration regimens or combined regimens.
  • a further aspect of the present invention provides the antigen binding proteins (e.g. antibodies) defined herein for use in therapy.
  • antigen binding proteins e.g. antibodies
  • “therapy” as used herein is meant the treatment of any medical condition.
  • Such treatment may be prophylactic (i.e. preventative), curative (or treatment intended to be curative), or palliative (i.e. treatment designed merely to limit, relieve or improve the symptoms of a condition).
  • antigen binding proteins e.g. antibodies
  • the present invention provides the antibodies defined herein for use in the treatment of celiac disease.
  • the present invention provides immunoconjugates of the invention for use in therapy, in particular for use in the treatment of celiac disease.
  • the present invention provides antigen binding proteins, or immunoconjugates thereof, for use in inhibiting and/or killing cells (e.g. antigen presenting cells such as B cells or plasma cells, for example as defined elsewhere herein) that express or present HLA-DQ2.5:DQ2.5-glia-a1a and/or HLA- DQ2.5:DQ2.5-glia-a2.
  • antigen presenting cells such as B cells or plasma cells, for example as defined elsewhere herein
  • animal or "patient” as used herein typically means human.
  • the present invention provides a method of treating celiac disease which method comprises administering to a patient in need thereof a therapeutically effective amount of an antigen binding protein (e.g. antibody) of the invention as defined herein.
  • an antigen binding protein e.g. antibody
  • Embodiments of the therapeutic uses of the invention described herein apply, mutatis mutandis, to this aspect of the invention.
  • the present invention provides a method of inhibiting and/or killing cells (e.g. antigen presenting cells such as B cells or plasma cells, for example as defined elsewhere herein) that express or present HLA-DQ2.5:DQ2.5- glia-a1a and/or HLA-DQ2.5:DQ2.5-glia-a2, which method comprises administering to a patient (e.g. a celiac disease patient) in need thereof a therapeutically effective amount of an antigen binding protein (e.g. antibody) of the invention as defined herein.
  • a patient e.g. a celiac disease patient
  • an antigen binding protein e.g. antibody
  • terapéuticaally effective amount is meant an amount sufficient to show benefit to the condition of the subject. Whether an amount is sufficient to show benefit to the condition of the subject may be determined by the subject him/herself or a physician.
  • the present invention provides the use of an antigen binding protein (e.g. antibody) of the invention as defined herein in the manufacture of a medicament for use in therapy.
  • Preferred therapy is the treatment of celiac disease.
  • Embodiments of the therapeutic uses of the invention described herein apply, mutatis mutandis, to this aspect of the invention.
  • the present invention provides the use of an antigen binding protein (e.g. antibody) of the invention as defined herein for the treatment of celiac disease.
  • an antigen binding protein e.g. antibody
  • Embodiments of the therapeutic uses of the invention described herein apply, mutatis mutandis, to this aspect of the invention.
  • the antigen binding proteins e.g. antibodies
  • compositions and methods and uses of the present invention may be used in combination with other therapeutics and diagnostics.
  • biological agents preferably diagnostic or therapeutic agents
  • the term “in combination” is succinctly used to cover a range of embodiments.
  • the "in combination” terminology unless otherwise specifically stated or made clear from the scientific terminology, thus applies to various formats of combined compositions, pharmaceuticals, cocktails, kits, methods, and first and second medical uses.
  • an antigen binding protein (e.g. antibody) of the invention is a naked antigen binding protein and is used in combination with an agent or therapeutic agent that is not operatively attached thereto.
  • an antigen binding protein (e.g. antibody) of the invention is an immunoconjugate wherein the antigen binding protein is itself operatively associated or combined with the agent or therapeutic agent.
  • the operative attachment includes all forms of direct and indirect attachment as described herein and known in the art.
  • the “combined” uses particularly in terms of an antigen binding protein (e.g. antibody) of the invention in combination with therapeutic agents, also include combined compositions, pharmaceuticals, cocktails, kits, methods, and first and second medical uses wherein the therapeutic agent is in the form of a prodrug.
  • the activating component able to convert the prodrug to the functional form of the drug may again be operatively associated with the antigen binding protein (e.g. antibodies) of the present invention.
  • the therapeutic compositions, combinations, pharmaceuticals, cocktails, kits, methods, and first and second medical uses will be "prodrug combinations".
  • the term “prodrug combination”, unless otherwise stated, means that the antigen binding protein (e.g. antibody) of the invention is operatively attached to a component capable of converting the prodrug to the active drug, not that the antigen binding protein (e.g. antibody) is attached to the prodrug itself.
  • prodrug embodiments of the invention need to be used as prodrug combinations. Accordingly, prodrugs may be used in any manner that they are used in the art.
  • compositions, pharmaceuticals, cocktails, kits, methods, and first and second medical uses are described, preferably in terms of diagnostic agents, and more preferably therapeutic agents, the combinations include antigen binding protein (e.g. antibody) that are“naked” (e.g.“naked” antibodies) and immunoconjugates, and wherein practice of the in vivo
  • antigen binding protein e.g. antibody
  • immunoconjugates e.g. antibodies
  • embodiments of the invention involves the prior, simultaneous or subsequent administration of the naked antigen binding protein or immunoconjugate and the biological, diagnostic or therapeutic agent; so long as, in some conjugated or unconjugated form, the overall provision of some form of the antigen binding protein (e.g. antibody) and some form of the biological, diagnostic or therapeutic agent is achieved.
  • the naked antigen binding protein or immunoconjugate and the biological, diagnostic or therapeutic agent
  • the invention therefore provides compositions, pharmaceutical
  • compositions, therapeutic kits and medicinal cocktails comprising, optionally in at least a first composition or container, a biologically effective amount of at least a first antigen binding protein (e.g. antibody) of the invention, or an antigen-binding fragment or immunoconjugate of such protein; and a biologically effective amount of at least a second biological agent, component or system.
  • a biologically effective amount of at least a first antigen binding protein (e.g. antibody) of the invention e.g. antibody
  • an antigen-binding fragment or immunoconjugate of such protein e.g., or an antigen-binding fragment or immunoconjugate of such protein
  • the "at least a second biological agent, component or system” will often be a therapeutic or diagnostic agent, component or system, but it need not be.
  • the at least a second biological agent, component or system may comprise components for modification of the antigen binding protein (e.g. antibody) and/or for attaching other agents to the antigen binding protein.
  • Certain preferred second biological agents, components or systems are prodrugs or components for making and using prodrugs, including components for making the prodrug itself and components for adapting the antigen binding proteins (e.g. antibodies) of the invention to function in such prodrug or ADEPT embodiments.
  • therapeutic or diagnostic agents are included as the at least a second biological agent, component or system
  • therapeutics and/or diagnostics will typically be those for use in connection with the treatment or diagnosis of disease, preferably celiac disease.
  • At least a second therapeutic agent will be included in the therapeutic kit or cocktail.
  • the term is chosen in reference to the antigen binding protein (e.g. antibody) of the invention being the first therapeutic agent.
  • compositions, kits and/or medicaments of the invention the combined effective amounts of the therapeutic agents may be comprised within a single container or container means, or comprised within distinct containers or container means.
  • the cocktails will generally be admixed together for combined use.
  • Agents formulated for intravenous administration will often be preferred.
  • kits may also comprise instructions for using the at least a first antigen binding protein (e.g. antibody) and the one or more other biological agents included.
  • a first antigen binding protein e.g. antibody
  • the at least a second therapeutic agent may be administered to the animal or patient substantially simultaneously with an antigen binding protein (e.g. antibody) of the invention; such as from a single antigen binding protein (e.g. antibody) of the invention; such as from a single antigen binding protein (e.g. antibody) of the invention; such as from a single antigen binding protein (e.g. antibody) of the invention.
  • an antigen binding protein e.g. antibody
  • the at least a second therapeutic agent may be administered to the animal or patient at a time sequential to the administration of the antigen binding protein (e.g. antibody) of the invention.
  • “At a time sequential”, as used herein, means “staggered", such that the at least a second therapeutic agent is
  • the two agents are administered at times effectively spaced apart to allow the two agents to exert their respective therapeutic effects, i.e., they are administered at "biologically effective time intervals".
  • the at least a second therapeutic agent may be administered to the animal or patient at a biologically effective time prior to the antigen binding protein (e.g. antibody) of the invention, or at a biologically effective time subsequent to that therapeutic.
  • Yet further aspects are methods of diagnosis or imaging of a subject comprising the administration of an appropriate amount of an antibody or other protein of the invention as defined herein to the subject and detecting the presence and/or amount and/or the location of the antibody or other protein of the invention in the subject.
  • a preferred disease to be imaged or diagnosed in accordance with the present invention is celiac disease.
  • the invention provides a method of diagnosing celiac disease in a mammal comprising the step of:
  • the invention provides a method of diagnosing celiac disease in a mammal comprising the steps of:
  • antigen binding protein e.g. antibody
  • antigen binding protein e.g. antibody
  • said contacting step is carried out under conditions that permit the formation of an antigen binding protein (e.g. antibody)-antigen complex.
  • an antigen binding protein e.g. antibody
  • Appropriate conditions can readily be determined by a person skilled in the art.
  • test sample for example a blood sample, biopsy cells, tissues or organs suspected of being affected by celiac disease (e.g. small intestine) or histological sections.
  • celiac disease e.g. small intestine
  • the presence of any amount of antigen binding protein (e.g. antibody)-antigen complex in the test sample would be indicative of the presence of celiac disease.
  • the amount of antigen binding protein (e.g. antibody)-antigen complex in the test sample is greater than, preferably significantly greater than, the amount found in an appropriate control sample. More preferably, the significantly greater levels are statistically significant, preferably with a probability value of ⁇ 0.05. Appropriate methods of determining statistical significance are well known and documented in the art and any of these may be used.
  • control samples could be readily chosen by a person skilled in the art, for example, in the case of diagnosis of celiac disease, an appropriate control would be a sample from a subject that did not have celiac disease.
  • control "values” could also be readily determined without running a control "sample” in every test, e.g. by reference to the range for normal subjects known in the art.
  • the antigen binding proteins (e.g. antibodies) of the invention may be labeled with a detectable marker such as a radio-opaque or radioisotope, such as 3 H, 14 C, 32 P, 35 S, 123 l, 125 l, 131 l; a radioactive emitter (e.g.
  • a, b or g emitters a fluorescent (fluorophore) or chemiluminescent (chromophore) compound, such as fluorescein isothiocyanate, rhodamine or luciferin; an enzyme, such as alkaline phosphatase, beta- galactosidase or horseradish peroxidase; an imaging agent; or a metal ion; or a chemical moiety such as biotin which may be detected by binding to a specific cognate detectable moiety, e.g. labelled avidin/streptavidin.
  • a specific cognate detectable moiety e.g. labelled avidin/streptavidin.
  • Preferred detectable markers for in vivo use include an X-ray detectable compound, such as bismuth (III), gold (III), lanthanum (III) or lead (II); a radioactive ion, such as copper 67 , gallium 67 , gallium 68 , indium 111 , indium 113 , iodine 123 , iodine 125 , iodine 131 , mercury 197 , mercury 203 , rhenium 186 , rhenium 188 , rubidium 97 , rubidium 103 , technetium 99m or yttrium 90 ; a nuclear magnetic spin-resonance isotope, such as cobalt (II), copper (II), chromium (III), dysprosium (III), erbium (III), gadolinium (III), holmium (III), iron (II), iron (III), manganese (II), neodymium (III),
  • the invention also includes diagnostic or imaging agents comprising the antigen binding proteins (e.g. antibodies) of the invention attached to a label that produces a detectable signal, directly or indirectly. Appropriate labels are described elsewhere herein.
  • the method of diagnosing celiac disease is an in vitro method. In one embodiment the method of diagnosing celiac disease is an in vivo method.
  • the present invention provides a method for screening for celiac disease in a subject.
  • antigen binding proteins e.g. antibodies
  • antigen binding proteins e.g. antibodies
  • the subject e.g. a human
  • the subject is a subject at risk of developing celiac disease or at risk of the occurrence of celiac disease, e.g. a healthy subject or a subject not displaying any symptoms of celiac disease or any other appropriate“at risk” subject.
  • the subject is a subject having, or suspected of having (or developing), or potentially having (or developing) celiac disease.
  • a method of the invention may further comprise an initial step of selecting a subject (e.g. a human subject) at risk of developing celiac disease, or at risk of the occurrence of celiac disease, or suspected of having (or developing) celiac disease, or potentially having (or developing) celiac disease.
  • Subjects may be selected on the basis that, for example, the subject (or sample, e.g. tissue biopsy, from the subject) is positive for one or more celiac disease markers or risk factors.
  • diagnostic methods of the invention are provided which further comprise a step of treating celiac disease by therapy, e.g. using an antigen binding protein (e.g. antibody) of the present invention.
  • an antigen binding protein e.g. antibody
  • an additional step of treating the celiac disease by therapy or surgery can be performed.
  • kits comprising one or more of the antigen binding proteins (e.g. antibodies), immunoconjugates or compositions of the invention or one or more of the nucleic acid molecules encoding the antibodies of the invention, or one or more recombinant expression vectors comprising the nucleic acid sequences of the invention, or one or more host cells or viruses comprising the recombinant expression vectors or nucleic acid sequences of the invention.
  • said kits are for use in the methods and uses as described herein, e.g. the therapeutic, diagnostic or imaging methods as described herein, or are for use in the in vitro assays or methods as described herein.
  • the antigen binding protein e.g.
  • kits in such kits may be a conjugate as described elsewhere herein, e.g. may be conjugated to a detectable moiety or may be an immunoconjugate.
  • kits comprise instructions for use of the kit components.
  • kits are for diagnosing or treating celiac disease, and optionally comprise instructions for use of the kit components to diagnose or treat this disease.
  • antigen binding proteins e.g. antibodies
  • the antigen binding proteins (e.g. antibodies) of the invention as defined herein may also be used as molecular tools for in vitro or in vivo applications and assays.
  • antigen binding proteins e.g. antibodies
  • these can function as members of specific binding pairs and these molecules can be used in any assay where the particular binding pair member is required.
  • yet further aspects of the invention provide a reagent that comprises an antigen binding protein (e.g. antibody) of the invention as defined herein and the use of such antigen binding proteins as molecular tools, for example in in vitro or in vivo assays.
  • an antigen binding protein e.g. antibody
  • Tables A, B, C, D, E, F, G, H, I and AA contain sequences of antibodies that bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a1a.
  • Tables A-l herein set forth sequences of the R2A1-8E, R3A2-9F, R4A1-3A (also referred to as 107), 107- 4.5D, 107-4.6D, 107-4.6C, 107-4.7C, 107-5.6A and 107-15.6A antibodies.
  • Table AA herein sets forth sequences of the RF117 antibody.
  • Tables J, K, L, M, N, O, P, Q, R, S, T, U, V and W contain sequences of antibodies that bind to, or specifically bind to, HLA-DQ2.5:DQ2.5-glia-a2.
  • Tables J- W herein set forth sequences of the 206, 217, 218, 220, 221 , 223, 226, 228, 206- 2.B1 1 , 206-3.D8, 206-3.C7, 206-3.C1 1 , 206-3. F6 and 206-12.F6 antibodies.
  • Table X presents certain consensus amino acid sequences.
  • Human IQG I constant domain -heavy chain human gamma 1 (SEQ ID NO:47Q) ASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPA
  • FIG. 1 Screening of HLA-DQ2.5:DQ2.5-glia-ala-specific binders and affinity measurements.
  • B ScFvs selected in R2, R3, and R4 were batch-cloned into a vector for soluble expression and random clones expressed and analyzed for target reactivity by
  • Clones preferentially binding HLA-DQ2.5:DQ2.5-glia-a1 a compared to HLA- DQ2.5:CLIP2 were chosen and sequenced. IGHV and IGKV gene segment usage was identified from the IMGT database. The pie charts show the gene segments used by the 1 1 unique clones.
  • C The unique clones were expressed and purified and binding affinity to HLA-DQ2.5:DQ2.5-glia-a1a was determined by single cycle kinetics using a 3-fold concentration series ranging from 2mM - 0.025mM scFv.
  • HLA-DQ2.5:DQ2.5-glia-ala-specific mAbs are highly specific.
  • the three hlgG1 mAbs and isotype control mAb were reformatted to hlgG1 , expressed by transient transfection in human 293E cells and purified from supernatants before assessment of specificity.
  • bar 1 is HLA-DQ2.5-glia-a1 a
  • bar 2 is CLIP2
  • bar 3 is HLA- DQ2.5-glia-y1
  • bar 4 is HLA-DQ2.5-glia-y2
  • bar 5 is HLA-DQ2.5-glia-y3
  • bar 6 is HLA-DQ2.5-glia-y4c
  • bar 7 is HLA-DQ2.5-glia-oo1
  • bar 8 is HLA-DQ2.5-glia-oo2
  • bar 9 is HLA-DQ2.5-glia-a2.
  • Figure 3 Mapping the fine-specificity and the structural basis for specificity.
  • B The hlgG1 mAbs were used to stain a panel of either HLA-DQ2.5:peptide or HLA-DQ2.2:peptide expressing A20 B cells and binding was analyzed by flow cytometry.

Abstract

La présente invention se rapporte d'une manière générale au domaine des protéines de liaison à l'antigène telles que des anticorps, en particulier ceux qui se lient à HLA-DQ2.5:DQ2.5- glia-α1a, ou qui se lient à HLA-DQ2.5:DQ2.5-glia-α2. L'invention concerne en outre des compositions et des immunoconjugués comprenant de tels anticorps et des procédés de production de tels anticorps. L'invention concerne également des procédés et des utilisations qui utilisent de tels anticorps, par exemple dans le traitement de la maladie cœliaque.
PCT/EP2019/053580 2018-02-13 2019-02-13 Protéines de liaison à l'antigène se liant au pmhc hla-dq2.5:dq2.5 présentant un peptide de gliadine WO2019158602A1 (fr)

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US16/969,679 US20210147552A1 (en) 2018-02-13 2019-02-13 ANTIGEN BINDING PROTEINS WHICH BIND TO THE pMHC HLA-DQ2.5:DQ2.5 PRESENTING A GLIADIN PEPTIDE
EP19706441.3A EP3752526A1 (fr) 2018-02-13 2019-02-13 Protéines de liaison à l'antigène se liant au pmhc hla-dq2.5:dq2.5 présentant un peptide de gliadine
AU2019220329A AU2019220329A1 (en) 2018-02-13 2019-02-13 Antigen binding proteins which bind to the pMHC HLA-DQ2.5:DQ2.5 presenting a gliadin peptide

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020204054A1 (fr) * 2019-04-01 2020-10-08 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5
EP3692072A4 (fr) * 2017-10-03 2021-12-22 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5
WO2022240916A1 (fr) * 2021-05-10 2022-11-17 The Regents Of The University Of Colorado, A Body Corporate Allèles hla modifiés pour le traitement de l'auto-immunité
WO2023052759A1 (fr) 2021-09-28 2023-04-06 Nextera As Épitopes de maladie cœliaque
US11739153B2 (en) 2020-09-18 2023-08-29 Chugai Seiyaku Kabushiki Kaisha Anti-HLA-DQ2.5 antibody and its use for the treatment of celiac disease
WO2024006576A1 (fr) * 2022-06-30 2024-01-04 Cue Biopharma, Inc. Constructions de proteines du cmh de classe ii
US11932867B2 (en) 2017-04-28 2024-03-19 National Jewish Health Methods of treating rheumatoid arthritis using RNA-guided genome editing of HLA gene

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014191839A2 (fr) * 2013-05-14 2014-12-04 Oslo Universitetssykehus Hf Détection de lymphocytes t spécifiques du gluten
WO2018155692A1 (fr) * 2017-02-27 2018-08-30 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5/8 et son utilisation pour le traitement de la maladie cœliaque
WO2019069993A1 (fr) * 2017-10-03 2019-04-11 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014191839A2 (fr) * 2013-05-14 2014-12-04 Oslo Universitetssykehus Hf Détection de lymphocytes t spécifiques du gluten
WO2018155692A1 (fr) * 2017-02-27 2018-08-30 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5/8 et son utilisation pour le traitement de la maladie cœliaque
WO2019069993A1 (fr) * 2017-10-03 2019-04-11 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NICOLE HARTWIG PETERSEN ET AL: "Fast and efficient characterization of an anti-gliadin monoclonal antibody epitope related to celiac disease using resin-bound peptides", JOURNAL OF IMMUNOLOGICAL METHODS, ELSEVIER SCIENCE PUBLISHERS B.V.,AMSTERDAM, NL, vol. 365, no. 1, 21 December 2010 (2010-12-21), pages 174 - 182, XP028141200, ISSN: 0022-1759, [retrieved on 20101231], DOI: 10.1016/J.JIM.2010.12.019 *
S.-W. QIAO ET AL: "Posttranslational Modification of Gluten Shapes TCR Usage in Celiac Disease", THE JOURNAL OF IMMUNOLOGY, vol. 187, no. 6, 17 August 2011 (2011-08-17), pages 3064 - 3071, XP055588335, ISSN: 0022-1767, DOI: 10.4049/jimmunol.1101526 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11932867B2 (en) 2017-04-28 2024-03-19 National Jewish Health Methods of treating rheumatoid arthritis using RNA-guided genome editing of HLA gene
EP3692072A4 (fr) * 2017-10-03 2021-12-22 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5
WO2020204054A1 (fr) * 2019-04-01 2020-10-08 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5
CN113950483A (zh) * 2019-04-01 2022-01-18 中外制药株式会社 抗hla-dq2.5抗体
EP3947466A4 (fr) * 2019-04-01 2022-12-28 Chugai Seiyaku Kabushiki Kaisha Anticorps anti-hla-dq2.5
US11739153B2 (en) 2020-09-18 2023-08-29 Chugai Seiyaku Kabushiki Kaisha Anti-HLA-DQ2.5 antibody and its use for the treatment of celiac disease
WO2022240916A1 (fr) * 2021-05-10 2022-11-17 The Regents Of The University Of Colorado, A Body Corporate Allèles hla modifiés pour le traitement de l'auto-immunité
WO2023052759A1 (fr) 2021-09-28 2023-04-06 Nextera As Épitopes de maladie cœliaque
WO2024006576A1 (fr) * 2022-06-30 2024-01-04 Cue Biopharma, Inc. Constructions de proteines du cmh de classe ii

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CA3091055A1 (fr) 2019-08-22

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